CVE-2026-73291

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Source
https://cve.org/CVERecord?id=CVE-2026-73291
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-73291.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-73291
Aliases
  • GHSA-mc6w-69r3-62h8
Published
2026-08-12T14:48:21Z
Modified
2026-10-28T02:30:59Z
Severity
  • 7.1 (High) CVSS_V3 - CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:H CVSS Calculator
Summary
Seerr: Path traversal to RCE via /avatarproxy image cache filename from upstream ETag
Details

Seerr is an open-source media request and discovery manager for Jellyfin, Plex, and Emby. Prior to version 3.4.0, Seerr's ImageProxy in server/lib/imageproxy.ts uses the upstream ETag and Content-Type response headers to build a cache filename for the unauthenticated GET /avatarproxy/:jellyfinUserId route, allowing a malicious or compromised Jellyfin or Emby server, or a man-in-the-middle attacker on a plaintext media-server connection, to supply traversal sequences that path.join and fs.writeFile normalize outside the cache directory, overwrite /app/dist/index.js or other files, and execute code as the node user after a container restart. This issue is fixed in version 3.4.0.

Database specific 
{
    "cna_assigner":  "GitHub_M",
    "cwe_ids":  [
        "CWE-22",
        "CWE-94"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/73xxx/CVE-2026-73291.json"
}
References

Affected packages

Git / github.com/seerr-team/seerr

Affected ranges

Type
GIT
Repo
https://github.com/seerr-team/seerr
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
2dbe8860179e83ed2044d5fc8ed17679ae05e5ad
Fixed
f484791105bd81bd5404e01410431ee6fe5769c2
Database specific
Show details 
{
    "extracted_events":  [
        {
            "range":  [
                {
                    "introduced":  "0"
                },
                {
                    "fixed":  "3.4.0"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StringRangeExpression"
        },
        {
            "range":  [
                {
                    "fixed":  "f484791105bd81bd5404e01410431ee6fe5769c2"
                }
            ],
            "source":  "REFERENCES_COMMIT"
        },
        {
            "original_tag":  "v3.4.0",
            "range":  [
                {
                    "fixed":  "2dbe8860179e83ed2044d5fc8ed17679ae05e5ad"
                }
            ],
            "source":  "REFERENCES_TAG"
        }
    ]
}

Affected versions

Other
preview-post-blacklist
preview-post-fetch
preview-pre-blacklist
preview-pre-fetch
v1.*
v1.0.0
v1.0.1
v1.0.2
v1.1.0
v1.1.1
v1.2.0
v1.2.1
v1.3.0
v1.4.0
v1.4.1
v1.5.0
v1.6.0
v1.7.0
v1.8.0
v1.8.1
v1.9.0
v1.9.1
v1.9.2
v2.*
v2.0.0
v2.0.1
v2.1.0
v2.2.0
v2.2.1
v2.2.2
v2.2.3
v2.3.0
v2.4.0
v2.5.0
v2.5.1
v2.5.2
v2.6.0
v2.7.0
v2.7.1
v2.7.2
v2.7.3
v3.*
v3.0.0
v3.0.1
v3.1.0
v3.1.1
v3.2.0
v3.3.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-73291.json"