High 7.5Published Feb 10, 2026

CVE-2026-25577Emmett has an Unhandled CookieError Exception Causing Denial of Service

Updated under an hour ago (Oct 27, 2026, 3:40 AM ET)

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It affects emmett-framework core. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for emmett-framework core

Exploited in the last 30 days

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: 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-248, CWE-307
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Deferred
Record last updated: Feb 11, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

emmett-framework core emmett_framework:core (from the name)	before 1.3.11	CNA record

References

References

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

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.