What is the CVSS score of CVE-2026-27963?

CVE-2026-27963 has a CVSS 3.1 base score of 4.8 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N. EPSS exploitation probability: 0.0%.

Which versions of Audiobookshelf are affected by CVE-2026-27963?

Organizations using versions should be aware of moderate risk from CVE-2026-27963, a cross-site scripting vulnerability rated CVSS 4.8.. A patch is available.

Is there a public PoC exploit available for CVE-2026-27963?

Yes, a public proof-of-concept exploit is available for CVE-2026-27963. Prioritise patching immediately. EPSS: 0.0%.

Audiobookshelf CVE-2026-27963

MEDIUM

Cross-site Scripting (XSS) (CWE-79)

2026-02-26 security-advisories@github.com

XSS Audiobookshelf

4.8

CVSS 3.1 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY

4.8 MEDIUM

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

Primary rating from GitHub Advisory · only source for this CVE.

CVSS VectorGitHub Advisory

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:55 vuln.today

PoC Detected

Feb 27, 2026 - 17:08 vuln.today

Public exploit code

Patch released

Feb 27, 2026 - 17:08 nvd

Patch available

CVE Published

Feb 26, 2026 - 03:16 nvd

MEDIUM 4.8

DescriptionGitHub Advisory

Audiobookshelf is a self-hosted audiobook and podcast server. A stored cross-site scripting (XSS) vulnerability exists in versions prior to 2.32.0 of the Audiobookshelf web application that allows arbitrary JavaScript execution through malicious library metadata. Attackers with library modification privileges can execute code in victim users' browsers, potentially leading to session hijacking and data exfiltration. Version 2.32.0 contains a patch for the issue.

AnalysisAI

Stored XSS in Audiobookshelf prior to version 2.32.0 enables privileged users to inject malicious code into library metadata that executes in other users' browsers, potentially compromising sessions and enabling data theft. Public exploit code exists for this vulnerability. …

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Vulnerability AssessmentAI

Risk Assessment	CVSS 4.8 (MEDIUM). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario	An attacker could exploit this flaw, session hijacking and data exfiltration.
Remediation	A vendor patch is available — apply it immediately. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 30 days: Identify affected systems running versions and apply vendor patches as part of regular patch cycle. …

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CVE-2026-27963 vulnerability details – vuln.today

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