Vulnerability · Published Apr 17, 2026 · Assigned by GitHub_M
CVE-2026-40258Gramps Web API has Zip Slip Path Traversal in Media Archive Import
Critical 9.1
In plain English
A critical-severity path traversal in gramps-web-api from gramps-project. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 35% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
The Gramps Web API is a Python REST API for the genealogical research software Gramps. Versions 1.6.0 through 3.11.0 have a path traversal vulnerability (Zip Slip) in the media archive import feature. An authenticated user with owner-level privileges can craft a malicious ZIP file with directory-traversal filenames to write arbitrary files outside the intended temporary extraction directory on the server's local filesystem. Startig in version 3.11.1, ZIP entry names are now validated against the resolved real path of the temporary directory before extraction. Any entry whose resolved path falls outside the temporary directory raises an error and aborts the import.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| PyPI | gramps-webapi | 3.11.1 | GHSA-m5gr-86j6-99jp |
| PyPI | gramps-webapi | 3.11.1 | PYSEC-2026-346 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| gramps-project | gramps-web-api | >= 1.6.0, < 3.11.1 |
Weakness: CWE-22 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
References
- https://github.com/gramps-project/gramps-web-api/security/advisories/GHSA-m5gr-86j6-99jp x_refsource_CONFIRM
- https://github.com/gramps-project/gramps-web-api/commit/3ed4342711e3ec849552df09b1fe2fbf2ca5c29a x_refsource_MISC
- https://github.com/gramps-project/gramps-web-api/releases/tag/v3.11.1 x_refsource_MISC