VulnerabilityDeferred

CVE-2026-25577

This allows unauthenticated attackers to trigger HTTP 500 errors and cause denial of service.

HIGH 7.5EPSS 0.28%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (0.28%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

Emmett is a framework designed to simplify your development process. Prior to 1.3.11, the cookies property in mmett_core.http.wrappers.Request does not handle CookieError exceptions when parsing malformed Cookie headers. This allows unauthenticated attackers to trigger HTTP 500 errors and cause denial of service. This vulnerability is fixed in 1.3.11.

CVSS 3.1: 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS: 0.28% probability · 20th percentile
CISA KEV: Not listed
Weakness: CWE-248, CWE-307
Source: security-advisories@github.com

References

https://github.com/emmett-framework/core/commit/9557ea23a27cbadf7774d8bca6bbe4b54fa8a3ec
https://github.com/emmett-framework/core/security/advisories/GHSA-x6cr-mq53-cc76
https://github.com/emmett-framework/core/security/advisories/GHSA-x6cr-mq53-cc76

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.