CVE-2026-25577
Awaiting Analysis Awaiting Analysis - Queue
CookieError Handling Flaw in Emmett Request Causes DoS

Publication date: 2026-02-10

Last updated on: 2026-02-11

Assigner: GitHub, Inc.

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 Scores
EPSS Scores
Probability:
Percentile:
Meta Information
Published
2026-02-10
Last Modified
2026-02-11
Generated
2026-06-16
AI Q&A
2026-02-10
EPSS Evaluated
2026-06-15
NVD
CVE-2026-25577
EUVD
EUVD-2026-7049
Affected Vendors & Products
Showing 3 associated CPEs
Vendor Product Version / Range
emmett emmett to 1.3.11 (inc)
emmett emmett-core to 1.3.11 (exc)
emmett emmett-core to 1.3.10 (inc)
Helpful Resources
Exploitability
CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-307 The product does not implement sufficient measures to prevent multiple failed authentication attempts within a short time frame.
CWE-248 An exception is thrown from a function, but it is not caught.
Attack-Flow Graph
AI Quick Actions
Instant insights powered by AI
Executive Summary

This vulnerability exists in the Emmett framework versions prior to 1.3.11. Specifically, the cookies property in mmett_core.http.wrappers.Request does not properly handle CookieError exceptions when parsing malformed Cookie headers. Because of this, unauthenticated attackers can cause the application to throw HTTP 500 errors, leading to a denial of service condition.

Impact Analysis

The vulnerability allows unauthenticated attackers to trigger HTTP 500 errors by sending malformed Cookie headers. This results in denial of service, meaning legitimate users may be unable to access the affected application or service while it is disrupted.

Compliance Impact

I don't know

Detection Guidance

I don't know

Mitigation Strategies

To mitigate this vulnerability, you should upgrade the Emmett framework to version 1.3.11 or later, where the issue with handling CookieError exceptions in the cookies property has been fixed.

Chat Assistant
Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-25577. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70
EPSS Chart