CVE-2026-61639: Wallos: Zip Slip path traversal in database restore writes files to webroot

Severity: high (CVSS 8.5 v4.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-08-31 · updated 2026-09-08
Weakness: CWE-22

Description

Wallos is an open-source, self-hostable personal subscription tracker. Prior to version 4.9.6, POST /endpoints/db/restore.php calls ZipArchive::extractTo() without validating entry names for ../ sequences. Admin uploads crafted zip with entry logos/../../endpoints/shell.php to write webshell to webroot. Extension filter only applies to post-extraction logo copy step. This issue has been patched in version 4.9.6.

Affected products

ellite Wallos: before 4.9.6

References

https://github.com/ellite/Wallos/commit/b75f13d0ffa3ed7e77e8e79e4b9fd3fc528c98d3
https://github.com/ellite/Wallos/pull/1092
https://github.com/ellite/Wallos/releases/tag/v4.9.6
https://github.com/ellite/Wallos/security/advisories/GHSA-3vg2-cxpg-m43g

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