CVE Catalog

CVE-2026-8612

MediumCVSS 5.3
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.13%

2th percentile - higher than 2% of all known CVEs

Summary

WWW::Mechanize::Cached versions before 2.00 for Perl deserialize cached HTTP responses from a world-writable on-disk cache, enabling local response forgery and code execution. The default Cache::FileCache under /tmp/FileCache is created mode 0777 without a sticky bit, and entries are read back through Storable::thaw, allowing a local attacker to replace a response and escalate to code execution.

Risk Assessment

A local attacker can forge HTTP responses seen by the application and achieve arbitrary code execution in the victim's context.

Recommendation

Update WWW::Mechanize::Cached to version 2.00 or later and configure a secure cache backend with restrictive permissions.

Related vulnerabilities

Original NVD description (English source)

WWW::Mechanize::Cached versions before 2.00 for Perl deserialize cached HTTP responses from a world-writable on-disk cache, enabling local response forgery and code execution. With no explicit cache backend, WWW::Mechanize::Cached constructs a default Cache::FileCache under /tmp/FileCache without overriding the backend's documented directory_umask of 000, so the cache root and its subdirectories are created mode 0777 with no sticky bit. Cache entries are named by sha1_hex of the request and read back through Storable::thaw on the next cache hit. A local attacker with write access to the cache tree can replace a victim's cache entry for a known URL with an arbitrary frozen HTTP::Response blob, causing the victim's next get() of that URL to return attacker controlled response bytes. Because the bytes are passed to Storable::thaw, a victim process that has loaded any class with a side-effectful STORABLE_thaw, DESTROY, or overload hook can be escalated to arbitrary code execution.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS