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CVE-2026-108981

LOW 3.6 CVSS 3.1
Published
October 12, 2026
Last modified
October 16, 2026
NVD status
Deferred
Reported by
cve@mitre.org
Weakness
CWE-61
CVSS vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:L

Description

ngx_cache_purge before 3.0.4 can allow file deletion via a symlink attack in certain situations where nginx and a served application (e.g., WordPress) run under the same user account. The attacker must be able to create a symlink inside the cache path. Version 3.0.4 fixes this for the case of a symlink created at an arbitrary earlier time, but does not resolve an applicable TOCTOU race condition. (The ngx_cache_purge module follows symlinks while walking the cache directory tree during purge operations. The module relies on nginx's ngx_walk_tree(), which relies on stat() and therefore follows symlinks.)

Affected products and versions

  • denji ngx_cache_purge — From 2.4.0 (including) to 2.5.6 (including)
  • denji ngx_cache_purge — From 3.0.0 (including) to 3.0.4 (excluding)

References

  • github.com https://github.com/nginx-modules/ngx_cache_purge/commit/a6da1352f52a8a02dd6828e88c39ed42fddcee96
  • github.com https://github.com/nginx-modules/ngx_cache_purge/pull/72
  • github.com https://github.com/nginx-modules/ngx_cache_purge/releases/tag/3.0.4
  • nvd.nist.gov Official NVD record