CVE-2026-32235 Vulnerability Analysis & Exploit Details

CVE-2026-32235
Vulnerability Scoring

5.9
/10
Significant Risk

Security assessments indicate that CVE-2026-32235 presents a notable risk, potentially requiring prompt mitigation.

Attack Complexity Details

  • Attack Complexity: High
    Exploits require significant effort and 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: Required
    User interaction is necessary for successful exploitation.

CVE-2026-32235 Details

Status: Analyzed

Last updated: 🕣 19 Mar 2026, 20:55 UTC
Originally published on: 🕖 12 Mar 2026, 19:16 UTC

Time between publication and last update: 7 days

CVSS Release: version 3

CVSS3 Source

security-advisories@github.com

CVSS3 Type

Secondary

CVSS3 Vector

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

CVE-2026-32235 Vulnerability Summary

CVE-2026-32235: Backstage is an open framework for building developer portals. Prior to 0.27.1, the experimental OIDC provider in @backstage/plugin-auth-backend is vulnerable to a redirect URI allowlist bypass. Instances that have enabled experimental Dynamic Client Registration or Client ID Metadata Documents and configured allowedRedirectUriPatterns are affected. A specially crafted redirect URI can pass the allowlist validation while resolving to an attacker-controlled host. If a victim approves the resulting OAuth consent request, their authorization code is sent to the attacker, who can exchange it for a valid access token. This requires victim interaction and that one of the experimental features is explicitly enabled, which is not the default. This vulnerability is fixed in 0.27.1.

Assessing the Risk of CVE-2026-32235

Access Complexity Graph

The exploitability of CVE-2026-32235 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-2026-32235

CVE-2026-32235 presents a challenge to exploit due to its high attack complexity, but the absence of privilege requirements still makes it a viable target for skilled attackers. A thorough security review is advised.

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-2026-32235, 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-2026-32235, showing how Confidentiality, Integrity, and Availability might be affected if the vulnerability is exploited. Higher values usually signal greater potential damage.

  • Confidentiality: High
    Exploiting CVE-2026-32235 can result in unauthorized access to sensitive data, severely compromising data privacy.
  • Integrity: Low
    Exploiting CVE-2026-32235 may cause minor changes to data without severely impacting its accuracy.
  • Availability: None
    CVE-2026-32235 does not impact system availability.

CVE-2026-32235 References

External References

CWE Common Weakness Enumeration

CWE-601

CAPEC Common Attack Pattern Enumeration and Classification

  • Cross-Site Flashing CAPEC-178 An attacker is able to trick the victim into executing a Flash document that passes commands or calls to a Flash player browser plugin, allowing the attacker to exploit native Flash functionality in the client browser. This attack pattern occurs where an attacker can provide a crafted link to a Flash document (SWF file) which, when followed, will cause additional malicious instructions to be executed. The attacker does not need to serve or control the Flash document. The attack takes advantage of the fact that Flash files can reference external URLs. If variables that serve as URLs that the Flash application references can be controlled through parameters, then by creating a link that includes values for those parameters, an attacker can cause arbitrary content to be referenced and possibly executed by the targeted Flash application.

Vulnerable Configurations

  • cpe:2.3:a:linuxfoundation:backstage:-:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:-:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.1.0:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.1.0:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.1.1:-:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.1.1:-:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.1.1:alpha0:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.1.1:alpha0:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.1.1:alpha1:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.1.1:alpha1:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.1.1:alpha10:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.1.1:alpha10:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.1.1:alpha11:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.1.1:alpha11:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.1.1:alpha12:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.1.1:alpha12:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.1.1:alpha13:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.1.1:alpha13:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.1.1:alpha14:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.1.1:alpha14:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.1.1:alpha15:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.1.1:alpha15:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.1.1:alpha16:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.1.1:alpha16:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.1.1:alpha17:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.1.1:alpha17:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.1.1:alpha18:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.1.1:alpha18:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.1.1:alpha19:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.1.1:alpha19:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.1.1:alpha2:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.1.1:alpha2:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.1.1:alpha20:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.1.1:alpha20:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.1.1:alpha21:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.1.1:alpha21:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.1.1:alpha22:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.1.1:alpha22:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.1.1:alpha23:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.1.1:alpha23:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.1.1:alpha24:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.1.1:alpha24:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.1.1:alpha25:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.1.1:alpha25:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.1.1:alpha26:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.1.1:alpha26:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.1.1:alpha3:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.1.1:alpha3:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.1.1:alpha4:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.1.1:alpha4:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.1.1:alpha5:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.1.1:alpha5:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.1.1:alpha6:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.1.1:alpha6:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.1.1:alpha7:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.1.1:alpha7:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.1.1:alpha8:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.1.1:alpha8:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.1.1:alpha9:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.1.1:alpha9:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.2.0:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.2.0:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.3.0:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.3.0:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.3.1:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.3.1:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.3.2:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.3.2:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.4.0:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.4.0:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.4.1:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.4.1:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.4.2:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.4.2:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.4.3:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.4.3:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.4.4:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.4.4:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.5.0:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.5.0:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.6.0:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.6.0:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.6.3:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.6.3:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.7.0:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.7.0:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.8.0:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.8.0:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.8.1:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.8.1:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.8.2:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.8.2:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.9.0:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.9.0:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.9.4:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.9.4:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.10.0:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.10.0:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.11.0:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.11.0:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.11.1:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.11.1:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.11.2:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.11.2:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.11.3:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.11.3:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.12.0:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.12.0:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.13.0:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.13.0:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.13.1:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.13.1:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.14.0:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.14.0:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.15.0:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.15.0:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.15.9:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.15.9:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.15.14:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.15.14:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.16.0:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.16.0:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.16.1:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.16.1:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.17.0:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.17.0:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.17.1:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.17.1:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.17.2:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.17.2:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.17.3:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.17.3:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.18.0:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.18.0:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.18.1:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.18.1:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.19.0:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.19.0:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.20.0:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.20.0:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.20.1:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.20.1:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.21.0:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.21.0:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.21.1:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.21.1:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.22.0:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.22.0:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.22.1:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.22.1:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.22.2:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.22.2:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.23.0:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.23.0:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.24.0:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.24.0:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.24.1:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.24.1:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.25.0:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.25.0:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.25.1:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.25.1:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.25.2:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.25.2:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.25.3:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.25.3:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.26.0:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.26.0:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.26.1:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.26.1:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:backstage:0.27.0:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:backstage:0.27.0:*:*:*:*:*:*:*

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