Connect your agent
AdvisoriesCriticalCheck your lockfilePluginHow it worksPricing Connect your agent

Advisory record · GHSA-494j-54xm-rwp3

AIOHTTP: Secure attribute not enforced for shared cookie

CVSS 6.3 MediumEPSS 0.0023 · 14th percentile

Published by the GitHub Advisory Database at 19 Oct 2026, 17:07 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
aiohttpPyPI<3.14.43.14.4
Identifiers
GHSA-494j-54xm-rwp3 · CVE-2026-111063
Weakness (CWE)
CWE-311 · CWE-1004
Tags
Published
19 Oct 2026
Updated
26 Oct 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

The aiohttp Python package is vulnerable in versions earlier than 3.14.4, where the Secure attribute is not enforced for shared cookies. An attacker who can observe or intercept unencrypted (non-HTTPS) traffic may be able to receive a cookie marked Secure, which should only be sent over encrypted connections. The source gives few details on the exact conditions. Upgrade aiohttp to version 3.14.4 or later, which is the listed fixed version.

Written 31 Oct 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
6.3 Medium 4.0 CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0023, the 14th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:07 UTC First seen by agentprime
  2. 31 Oct 2026, 14:07 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.