How severe is CVE-2026-27973?

CVE-2026-27973 has a CVSS 3.x base score of 4.0, rated medium severity. It is exploitable over network with high attack complexity, requires high privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2026-27973 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (6th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-27973?

CVE-2026-27973 primarily affects Audiobookshelf. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-27973?

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

Does CVE-2026-27973 have an EU (EUVD) identifier?

Yes. CVE-2026-27973 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-8823.

When was CVE-2026-27973 published?

CVE-2026-27973 was published on 2026-02-26 and last updated on 2026-06-17.

CVE-2026-27973

CVE-2026-27973 is a medium-severity vulnerability in Audiobookshelf with a CVSS 3.x base score of 4.0. 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 4.0)
EPSS exploit prediction: 0% (6th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-8823
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 0.12.0-beta of the Audiobookshelf mobile application that allows arbitrary JavaScript execution through malicious library metadata. Attackers with library modification privileges can execute code in victim users' browsers/WebViews, potentially leading to session hijacking, data exfiltration, and unauthorized access to native device APIs. The issue is fixed in audiobookshelf-app version 0.12.0-beta, corresponding to audiobookshelf version 2.12.0.

Frequently asked questions

What is CVE-2026-27973?: Audiobookshelf is a self-hosted audiobook and podcast server. A stored cross-site scripting (XSS) vulnerability exists in versions prior to 0.12.0-beta of the Audiobookshelf mobile application that allows arbitrary JavaScript execution through malicious library metadata. Attackers with library modification privileges can execute code in victim users' browsers/WebViews, potentially leading to session hijacking, data exfiltration, and unauthorized access to native device APIs. The issue is fixed in audiobookshelf-app version 0.12.0-beta, corresponding to audiobookshelf version 2.12.0.
How severe is CVE-2026-27973?: CVE-2026-27973 has a CVSS 3.x base score of 4.0, rated medium severity. It is exploitable over network with high attack complexity, requires high privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2026-27973 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (6th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-27973?: CVE-2026-27973 primarily affects Audiobookshelf. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-27973?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-27973 have an EU (EUVD) identifier?: Yes. CVE-2026-27973 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-8823.
When was CVE-2026-27973 published?: CVE-2026-27973 was published on 2026-02-26 and last updated on 2026-06-17.

References

Affected products (2)

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

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…
CVE-2025-25205 — High (CVSS 8.2): Audiobookshelf is a self-hosted audiobook and podcast server. Starting in version 2.17.0 and prior to version 2.19.1, a…
CVE-2023-47619 — High (CVSS 8.1): Audiobookshelf is a self-hosted audiobook and podcast server. In versions 2.4.3 and prior, users with the update…
CVE-2023-47624 — High (CVSS 7.5): Audiobookshelf is a self-hosted audiobook and podcast server. In versions 2.4.3 and prior, any user (regardless of…
CVE-2024-43797 — Medium (CVSS 6.3): audiobookshelf is a self-hosted audiobook and podcast server. A non-admin user is not allowed to create libraries (or…
CVE-2025-46338 — Medium (CVSS 6.1): Audiobookshelf is a self-hosted audiobook and podcast server. Prior to version 2.21.0, an improper input handling…

All CVEs affecting Audiobookshelf →

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

CVE-2025-49410 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Imran Emu TC…
CVE-2024-47875 — Critical (CVSS 10.0): DOMPurify is a DOM-only, super-fast, uber-tolerant XSS sanitizer for HTML, MathML and SVG. DOMpurify was vulnerable to…
CVE-2024-6886 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Gitea…
CVE-2023-45144 — Critical (CVSS 10.0): com.xwiki.identity-oauth:identity-oauth-ui is a package to aid in building identity and service providers based on…
CVE-2023-45138 — Critical (CVSS 10.0): Change Request is an pplication allowing users to request changes on a wiki without publishing the changes directly.…
CVE-2022-4361 — Critical (CVSS 10.0): Keycloak, an open-source identity and access management solution, has a cross-site scripting (XSS) vulnerability in the…

Browse all CWE-79 (Cross-site Scripting (XSS)) vulnerabilities →