Vulnerability details
CVE-2026-49247
jellyfin jellyfin
Jellyfin: Potential Authenticated path traversal in /ClientLog/Document
CVSS 3.1
8.8High
Official description
Jellyfin is an open source self hosted media server. From 10.9.0 until 10.11.10, the POST /ClientLog/Document endpoint accepts the Authorization header's Client and Version fields and uses them unsanitized as components of the on-disk filename when persisting client-uploaded log documents. As a result, any authenticated non-admin user can include ../ sequences in the Client field to cause Jellyfin to write attacker-controlled content to arbitrary paths reachable by the Jellyfin service user, with a forced .log suffix. This vulnerability is fixed in 10.11.10.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 8.8High | 3.1 | CVEProject cvelistV5 (CNA) (GitHub_M) | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| jellyfin | jellyfin | >= 10.9.0, < 10.11.10 | CVEProject cvelistV5 (CNA) |
References and advisories
1- https://github.com/jellyfin/jellyfin/security/advisories/GHSA-jg92-mrxq-vv75 x_refsource_CONFIRM
Kolun on Telegram @kolunsec
Exploited CVEs, key news and a daily digest
Alerts for this product's next CVEsFollow the product to get new vulnerabilities on Telegram.
Details
- Published
- 2026-06-24
- Last updated
- 2026-06-26
- State
- Published
- Assigner (CNA)
- GitHub_M
Exploit prediction (EPSS)
0.54%
Probability of exploitation in 30 days
46%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- None
- Technical impact
- Total
Weaknesses (CWE)
- CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')