Signal is active with 1 mentions in latest observed window
Recommended action window: Monitor and triage in normal cycle
NVD description
Mojolicious versions from 4.59 before 9.48 for Perl expose a stable representation of the session CSRF token to a BREACH compression oracle. _csrf_token generates and caches one token per session and returns the same value on every call, and _csrf_field places that value in a hidden `csrf_token` input. When a response carrying the token also echoes attacker-controlled input and is gzip-compressed, the chosen values and the resulting compressed lengths form a BREACH oracle. An attacker able to query it can recover the token and pass csrf_protect validation.
Priority
LOW
Exploitation
NONE
PoC
NONE
Patch
NONE
Momentum
NONE
Perl CPAN CVE-2026-15747: Mojolicious from 4.59 before 9.48 expose a stable representation of the session CSRF token to a BREACH compression oracle https://openwall.com/lists/oss-security/2026/07/14/16
Post summary
CVE-2026-15747 discloses that Mojolicious versions 4.59 through 9.48 expose the CSRF token to a BREACH compression oracle. No exploit, patch, or active exploitation information is provided.