CVE-2026-25577

Emmett has an Unhandled CookieError Exception Causing Denial of Service

CVSS 7.5 HIGHEPSS 0.3%CWE-248 CWE-307

Vexday Risk Score

21Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 7.5EPSS 0.3%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

10 Feb 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

emmett-framework · core

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References

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