How severe is CVE-2026-27963?

CVE-2026-27963 has a CVSS 3.x base score of 4.8, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2026-27963 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (13th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-27963?

CVE-2026-27963 affects Audiobookshelf. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-27963?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-27963 have an EU (EUVD) identifier?

Yes. CVE-2026-27963 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-8830.

When was CVE-2026-27963 published?

CVE-2026-27963 was published on 2026-02-26 and last updated on 2026-06-17.

CVE-2026-27963

CVE-2026-27963 is a medium-severity vulnerability in Audiobookshelf with a CVSS 3.x base score of 4.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 4.8)
EPSS exploit prediction: 0% (13th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-8830
Weakness: CWE-79
Affected product: Audiobookshelf
Published: 2026-02-26
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2026-27963?: 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.
How severe is CVE-2026-27963?: CVE-2026-27963 has a CVSS 3.x base score of 4.8, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2026-27963 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (13th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-27963?: CVE-2026-27963 affects Audiobookshelf. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-27963?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-27963 have an EU (EUVD) identifier?: Yes. CVE-2026-27963 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-8830.
When was CVE-2026-27963 published?: CVE-2026-27963 was published on 2026-02-26 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:audiobookshelf:audiobookshelf:*:*:*:*:*:*:*:*

More vulnerabilities in Audiobookshelf

CVE-2025-57800 — High (CVSS 8.8): Audiobookshelf is an open-source self-hosted audiobook server. In versions 2.6.0 through 2.26.3, the application does…
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