CVE-2025-49826 Vulnerability Analysis & Exploit Details

CVE-2025-49826
Vulnerability Scoring

7.5
/10
Very High Risk

Highly exploitable, CVE-2025-49826 poses a critical security risk that could lead to severe breaches.

Attack Complexity Details

  • Attack Complexity: Low
    Exploits can be performed without significant complexity or special conditions.
  • Attack Vector: Network
    Vulnerability is exploitable over a network without physical access.
  • Privileges Required: None
    No privileges are required for exploitation.
  • Scope: Unchanged
    Exploit remains within the originally vulnerable component.
  • User Interaction: None
    No user interaction is necessary for exploitation.

CVE-2025-49826 Details

Status: Analyzed

Last updated: 🕒 10 Sep 2025, 15:28 UTC
Originally published on: 🕘 03 Jul 2025, 21:15 UTC

Time between publication and last update: 68 days

CVSS Release: version 3

CVSS3 Source

security-advisories@github.com

CVSS3 Type

Secondary

CVSS3 Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVE-2025-49826 Vulnerability Summary

CVE-2025-49826: Next.js is a React framework for building full-stack web applications. From versions 15.0.4-canary.51 to before 15.1.8, a cache poisoning bug leading to a Denial of Service (DoS) condition was found in Next.js. This issue does not impact customers hosted on Vercel. Under certain conditions, this issue may allow a HTTP 204 response to be cached for static pages, leading to the 204 response being served to all users attempting to access the page. This issue has been addressed in version 15.1.8.

Assessing the Risk of CVE-2025-49826

Access Complexity Graph

The exploitability of CVE-2025-49826 depends on two key factors: attack complexity (the level of effort required to execute an exploit) and privileges required (the access level an attacker needs).

Exploitability Analysis for CVE-2025-49826

With low attack complexity and no required privileges, CVE-2025-49826 is an easy target for cybercriminals. Organizations should prioritize immediate mitigation measures to prevent unauthorized access and data breaches.

Understanding AC and PR

A lower complexity and fewer privilege requirements make exploitation easier. Security teams should evaluate these aspects to determine the urgency of mitigation strategies, such as patch management and access control policies.

Attack Complexity (AC) measures the difficulty in executing an exploit. A high AC means that specific conditions must be met, making an attack more challenging, while a low AC means the vulnerability can be exploited with minimal effort.

Privileges Required (PR) determine the level of system access necessary for an attack. Vulnerabilities requiring no privileges are more accessible to attackers, whereas high privilege requirements limit exploitation to authorized users with elevated access.

CVSS Score Breakdown Chart

Above is the CVSS Sub-score Breakdown for CVE-2025-49826, illustrating how Base, Impact, and Exploitability factors combine to form the overall severity rating. A higher sub-score typically indicates a more severe or easier-to-exploit vulnerability.

CIA Impact Analysis

Below is the Impact Analysis for CVE-2025-49826, showing how Confidentiality, Integrity, and Availability might be affected if the vulnerability is exploited. Higher values usually signal greater potential damage.

  • Confidentiality: None
    CVE-2025-49826 has no significant impact on data confidentiality.
  • Integrity: None
    CVE-2025-49826 poses no threat to data integrity.
  • Availability: High
    CVE-2025-49826 can disrupt system operations, potentially causing complete denial of service (DoS).

CVE-2025-49826 References

External References

CWE Common Weakness Enumeration

CWE-444

CAPEC Common Attack Pattern Enumeration and Classification

  • HTTP Response Smuggling CAPEC-273 An adversary manipulates and injects malicious content in the form of secret unauthorized HTTP responses, into a single HTTP response from a vulnerable or compromised back-end HTTP agent (e.g., server). See CanPrecede relationships for possible consequences. Modification/manipulation of HTTP message headers, request-line and body parameters to disrupt and interfere in the interpretation and parsing of HTTP message lengths/boundaries for consecutive HTTP messages by HTTP agents in a HTTP chain or network path.
  • HTTP Request Smuggling CAPEC-33 An adversary abuses the flexibility and discrepancies in the parsing and interpretation of HTTP Request messages using various HTTP headers, request-line and body parameters as well as message sizes (denoted by the end of message signaled by a given HTTP header) by different intermediary HTTP agents (e.g., load balancer, reverse proxy, web caching proxies, application firewalls, etc.) to secretly send unauthorized and malicious HTTP requests to a back-end HTTP agent (e.g., web server). See CanPrecede relationships for possible consequences. Modification/manipulation of HTTP message headers, request-line and body parameters to disrupt and interfere in the interpretation and parsing of HTTP message lengths/boundaries for consecutive HTTP messages by HTTP agents in a HTTP chain or network path.

Vulnerable Configurations

  • cpe:2.3:a:vercel:next.js:15.0.4:canary0:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.0.4:canary0:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.0.4:canary1:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.0.4:canary1:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.0.4:canary10:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.0.4:canary10:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.0.4:canary11:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.0.4:canary11:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.0.4:canary12:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.0.4:canary12:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.0.4:canary13:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.0.4:canary13:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.0.4:canary14:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.0.4:canary14:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.0.4:canary15:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.0.4:canary15:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.0.4:canary16:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.0.4:canary16:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.0.4:canary17:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.0.4:canary17:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.0.4:canary18:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.0.4:canary18:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.0.4:canary19:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.0.4:canary19:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.0.4:canary2:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.0.4:canary2:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.0.4:canary20:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.0.4:canary20:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.0.4:canary21:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.0.4:canary21:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.0.4:canary22:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.0.4:canary22:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.0.4:canary23:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.0.4:canary23:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.0.4:canary24:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.0.4:canary24:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.0.4:canary25:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.0.4:canary25:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.0.4:canary26:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.0.4:canary26:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.0.4:canary27:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.0.4:canary27:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.0.4:canary28:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.0.4:canary28:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.0.4:canary29:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.0.4:canary29:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.0.4:canary3:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.0.4:canary3:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.0.4:canary30:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.0.4:canary30:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.0.4:canary31:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.0.4:canary31:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.0.4:canary32:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.0.4:canary32:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.0.4:canary33:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.0.4:canary33:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.0.4:canary34:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.0.4:canary34:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.0.4:canary35:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.0.4:canary35:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.0.4:canary36:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.0.4:canary36:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.0.4:canary37:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.0.4:canary37:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.0.4:canary38:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.0.4:canary38:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.0.4:canary39:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.0.4:canary39:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.0.4:canary4:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.0.4:canary4:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.0.4:canary40:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.0.4:canary40:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.0.4:canary41:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.0.4:canary41:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.0.4:canary42:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.0.4:canary42:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.0.4:canary43:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.0.4:canary43:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.0.4:canary44:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.0.4:canary44:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.0.4:canary45:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.0.4:canary45:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.0.4:canary46:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.0.4:canary46:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.0.4:canary47:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.0.4:canary47:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.0.4:canary48:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.0.4:canary48:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.0.4:canary49:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.0.4:canary49:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.0.4:canary5:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.0.4:canary5:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.0.4:canary50:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.0.4:canary50:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.0.4:canary51:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.0.4:canary51:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.0.4:canary52:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.0.4:canary52:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.0.4:canary6:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.0.4:canary6:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.0.4:canary7:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.0.4:canary7:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.0.4:canary8:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.0.4:canary8:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.0.4:canary9:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.0.4:canary9:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.1.0:*:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.1.0:*:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.1.1:-:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.1.1:-:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.1.1:canary0:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.1.1:canary0:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.1.1:canary1:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.1.1:canary1:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.1.1:canary10:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.1.1:canary10:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.1.1:canary11:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.1.1:canary11:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.1.1:canary12:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.1.1:canary12:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.1.1:canary13:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.1.1:canary13:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.1.1:canary14:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.1.1:canary14:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.1.1:canary15:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.1.1:canary15:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.1.1:canary16:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.1.1:canary16:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.1.1:canary17:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.1.1:canary17:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.1.1:canary18:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.1.1:canary18:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.1.1:canary19:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.1.1:canary19:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.1.1:canary2:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.1.1:canary2:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.1.1:canary20:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.1.1:canary20:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.1.1:canary21:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.1.1:canary21:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.1.1:canary22:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.1.1:canary22:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.1.1:canary23:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.1.1:canary23:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.1.1:canary24:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.1.1:canary24:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.1.1:canary25:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.1.1:canary25:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.1.1:canary26:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.1.1:canary26:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.1.1:canary27:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.1.1:canary27:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.1.1:canary3:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.1.1:canary3:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.1.1:canary4:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.1.1:canary4:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.1.1:canary5:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.1.1:canary5:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.1.1:canary6:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.1.1:canary6:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.1.1:canary7:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.1.1:canary7:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.1.1:canary8:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.1.1:canary8:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.1.1:canary9:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.1.1:canary9:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.1.2:*:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.1.2:*:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.1.3:*:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.1.3:*:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.1.4:*:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.1.4:*:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.1.5:*:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.1.5:*:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.1.6:*:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.1.6:*:*:*:*:node.js:*:*
  • cpe:2.3:a:vercel:next.js:15.1.7:*:*:*:*:node.js:*:*
    cpe:2.3:a:vercel:next.js:15.1.7:*:*:*:*:node.js:*:*

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Other 5 Recently Published CVEs Vulnerabilities

  • CVE-2025-62672 – rplay through 3.3.2 allows attackers to cause a denial of service (SIGSEGV and daemon crash) or possibly have unspecified other impact. This occurs...
  • CVE-2025-47410 – Apache Geode is vulnerable to CSRF attacks through GET requests to the Management and Monitoring REST API that could allow an attacker who has tric...
  • CVE-2025-11926 – The Related Posts Lite plugin for WordPress is vulnerable to Stored Cross-Site Scripting via admin settings in all versions up to, and including, 1...
  • CVE-2025-9890 – The Theme Editor plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 3.0. This is due to missing...
  • CVE-2025-5555 – A vulnerability has been found in Nixdorf Wincor PORT IO Driver up to 1.0.0.1. This affects the function sub_11100 in the library wnport.sys of the...