CVE-2026-119551: Auth Bypass (CVSS 6.5)

Description

Jellyfin through 12.4 contains an authorization bypass vulnerability in SuggestionsController.GetSuggestions that allows authenticated non-administrator users to bypass library and parental restrictions by omitting the userId parameter. Attackers can repeatedly call GET /Items/Suggestions without userId to enumerate restricted items, including IDs and server filesystem paths, and then stream them.

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CVSS v3.1 Score

6.5

MEDIUM

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

EPSS — Exploit Prediction

0.0032

Probability of exploitation

0.25%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-862 Missing Authorization

References

Other References

https://abraxaslabs.tech/research/jellyfin-suggestions-idor https://github.com/jellyfin/jellyfin https://github.com/jellyfin/jellyfin/blob/v12.4/Jellyfin.Api/Controllers/SuggestionsController.cs#L70-L95 https://github.com/jellyfin/jellyfin/security/advisories/GHSA-9x85-gx46-6522 https://www.vulncheck.com/advisories/jellyfin-through-12.4-authorization-bypass-via-get-items-suggestions

Frequently Asked Questions

What is CVE-2026-119551? +

Jellyfin through 12.4 contains an authorization bypass vulnerability in SuggestionsController.GetSuggestions that allows authenticated non-administrator users to bypass library and parental restrictions by omitting the userId parameter. Attackers can repeatedly call GET /Items/Suggestions without userId to enumerate restricted items, including IDs and server filesystem paths, and then stream them. It has a CVSS v3.1 base score of 6.5 (MEDIUM).

How severe is CVE-2026-119551? +

CVE-2026-119551 has a CVSS v3.1 score of 6.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0032, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-119551? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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