CVE-2026-34763 Vulnerability Analysis & Exploit Details

CVE-2026-34763
Vulnerability Scoring

5.3

/10

Significant Risk

Security assessments indicate that CVE-2026-34763 presents a notable risk, potentially requiring prompt mitigation.

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-2026-34763 Details

Status: Analyzed

Last updated: 🕔 16 Apr 2026, 17:26 UTC
Originally published on: 🕔 02 Apr 2026, 17:16 UTC

Time between publication and last update: 14 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:L/I:N/A:N

CVE-2026-34763 Vulnerability Summary

CVE-2026-34763: Rack is a modular Ruby web server interface. Prior to versions 2.2.23, 3.1.21, and 3.2.6, Rack::Directory interpolates the configured root path directly into a regular expression when deriving the displayed directory path. If root contains regex metacharacters such as +, *, or ., the prefix stripping can fail and the generated directory listing may expose the full filesystem path in the HTML output. This issue has been patched in versions 2.2.23, 3.1.21, and 3.2.6.

Assessing the Risk of CVE-2026-34763

Access Complexity Graph

The exploitability of CVE-2026-34763 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-2026-34763

With low attack complexity and no required privileges, CVE-2026-34763 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-2026-34763, 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-2026-34763, showing how Confidentiality, Integrity, and Availability might be affected if the vulnerability is exploited. Higher values usually signal greater potential damage.

Confidentiality: Low
CVE-2026-34763 could lead to minor leaks of non-critical information without major privacy breaches.
Integrity: None
CVE-2026-34763 poses no threat to data integrity.
Availability: None
CVE-2026-34763 does not impact system availability.

CVE-2026-34763 References

External References

https://github.com/rack/rack/security/advisories/GHSA-7mqq-6cf9-v2qp

CWE Common Weakness Enumeration

CWE-625

Vulnerable Configurations

cpe:2.3:a:rack:rack:0.1:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:0.1:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:0.2:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:0.2:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:0.3:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:0.3:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:0.4:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:0.4:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:0.9:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:0.9:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:0.9.1:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:0.9.1:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:1.0:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:1.0:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:1.0.1:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:1.0.1:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:1.1:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:1.1:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:1.1.2:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:1.1.2:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:1.1.3:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:1.1.3:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:1.1.4:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:1.1.4:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:1.1.5:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:1.1.5:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:1.1.6:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:1.1.6:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:1.2:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:1.2:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:1.2.1:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:1.2.1:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:1.2.2:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:1.2.2:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:1.2.3:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:1.2.3:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:1.2.4:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:1.2.4:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:1.2.5:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:1.2.5:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:1.2.6:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:1.2.6:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:1.2.7:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:1.2.7:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:1.2.8:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:1.2.8:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:1.3.0:-:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:1.3.0:-:*:*:*:ruby:*:*
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cpe:2.3:a:rack:rack:1.3.0:beta2:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:1.3.1:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:1.3.1:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:1.3.2:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:1.3.2:*:*:*:*:ruby:*:*
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cpe:2.3:a:rack:rack:1.3.3:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:1.3.4:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:1.3.4:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:1.3.5:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:1.3.5:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:1.3.6:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:1.3.6:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:1.3.7:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:1.3.7:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:1.3.8:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:1.3.8:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:1.3.9:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:1.3.9:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:1.3.10:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:1.3.10:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:1.4.0:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:1.4.0:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:1.4.1:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:1.4.1:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:1.4.2:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:1.4.2:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:1.4.3:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:1.4.3:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:1.4.4:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:1.4.4:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:1.4.5:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:1.4.5:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:1.4.6:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:1.4.6:*:*:*:*:ruby:*:*
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cpe:2.3:a:rack:rack:1.5.4:*:*:*:*:ruby:*:*
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cpe:2.3:a:rack:rack:2.2.2:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:2.2.3:*:*:*:*:ruby:*:*
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cpe:2.3:a:rack:rack:2.2.4:*:*:*:*:ruby:*:*
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cpe:2.3:a:rack:rack:2.2.5:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:2.2.6:*:*:*:*:ruby:*:*
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cpe:2.3:a:rack:rack:2.2.11:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:2.2.11:*:*:*:*:ruby:*:*
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cpe:2.3:a:rack:rack:2.2.12:*:*:*:*:ruby:*:*
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cpe:2.3:a:rack:rack:2.2.13:*:*:*:*:ruby:*:*
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cpe:2.3:a:rack:rack:2.2.17:*:*:*:*:ruby:*:*
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cpe:2.3:a:rack:rack:2.2.19:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:2.2.19:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:2.2.20:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:2.2.20:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:3.0.0:-:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:3.0.0:-:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:3.0.0:rc1:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:3.0.0:rc1:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:3.0.0:beta1:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:3.0.0:beta1:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:3.0.1:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:3.0.1:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:3.0.2:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:3.0.2:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:3.0.3:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:3.0.3:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:3.0.4:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:3.0.4:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:3.0.4.1:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:3.0.4.1:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:3.0.4.2:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:3.0.4.2:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:3.0.5:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:3.0.5:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:3.0.6:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:3.0.6:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:3.0.6.1:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:3.0.6.1:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:3.0.7:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:3.0.7:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:3.0.8:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:3.0.8:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:3.0.9:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:3.0.9:*:*:*:*:ruby:*:*
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cpe:2.3:a:rack:rack:3.0.9.1:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:3.0.10:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:3.0.10:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:3.0.12:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:3.0.12:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:3.0.13:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:3.0.13:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:3.0.14:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:3.0.14:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:3.0.15:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:3.0.15:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:3.0.16:-:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:3.0.16:-:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:3.0.17:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:3.0.17:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:3.0.18:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:3.0.18:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:3.1.0:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:3.1.0:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:3.1.0:-:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:3.1.0:-:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:3.1.1:*:*:*:*:ruby:*:*
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cpe:2.3:a:rack:rack:3.1.2:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:3.1.2:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:3.1.3:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:3.1.3:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:3.1.4:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:3.1.4:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:3.1.5:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:3.1.5:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:3.1.6:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:3.1.6:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:3.1.7:*:*:*:*:ruby:*:*
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cpe:2.3:a:rack:rack:3.1.10:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:3.1.11:*:*:*:*:ruby:*:*
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cpe:2.3:a:rack:rack:3.1.12:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:3.1.12:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:3.1.13:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:3.1.13:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:3.1.14:-:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:3.1.14:-:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:3.1.15:*:*:*:*:ruby:*:*
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cpe:2.3:a:rack:rack:3.1.17:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:3.1.18:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:3.1.18:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:3.2.0:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:3.2.0:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:3.2.1:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:3.2.1:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:3.2.2:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:3.2.2:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:3.2.3:*:*:*:*:ruby:*:*
cpe:2.3:a:rack:rack:3.2.3:*:*:*:*:ruby:*:*

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