CVE-2026-42590
- Source
- https://cve.org/CVERecord?id=CVE-2026-42590
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-42590.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-42590
- Aliases
- Published
- 2026-05-14T15:36:30.386Z
- Modified
- 2026-07-15T01:48:51.715767069Z
- Severity
-
- 8.2 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L CVSS Calculator
- Summary
- Gotenberg: ExifTool group-prefix syntax bypasses dangerous-tag blocklist
- Details
-
Gotenberg is a Docker-powered stateless API for PDF files. Prior to 8.30.0, The ExifTool metadata write blocklist in Gotenberg can be bypassed using ExifTool's group-prefix syntax, enabling arbitrary file rename, move, hardlink, and symlink creation on the server. ExifTool supports group-prefix syntax where File:FileName is processed identically to FileName -- the prefix is stripped by SetNewValue in Writer.pl before tag matching. The safeKeyPattern regex (^[a-zA-Z0-9-_.:]+$) allows colons, so prefixed tag names pass validation. Any prefix works: File:FileName, System:Directory, a:HardLink, etc. Additionally, FilePermissions, FileUserID, and FileGroupID pseudo-tags are not blocked at all and can modify file attributes without any prefix. This vulnerability is fixed in 8.30.0.
- Database specific
{ "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42590.json", "cwe_ids": [ "CWE-184" ], "cna_assigner": "GitHub_M" }- References
Affected packages
Git / github.com/gotenberg/gotenberg
Affected ranges
- Type
- GIT
- Repo
- https://github.com/gotenberg/gotenberg
- Events
-
Introduced0 Unknown introduced commit / All previous commits are affectedFixed
- Database specific
{ "extracted_events": [ { "introduced": "0" }, { "fixed": "8.30.0" } ], "source": [ "AFFECTED_FIELD", "CPE_RANGE" ], "cpe": "cpe:2.3:a:thecodingmachine:gotenberg:*:*:*:*:*:*:*:*" }