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Advisory record · GHSA-j6w9-fv6q-3q52

Rack allows Percent-encoded cookies to overwrite existing prefixed cookie names

CVSS 7.5 HighEPSS 0.030 · 87th percentile

Published by the GitHub Advisory Database at 24 Jun 2020, 17:15 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
rackRubyGems<2.1.4 || >=2.2.0, <2.2.32.1.4, 2.2.3
Identifiers
GHSA-j6w9-fv6q-3q52 · CVE-2020-8184
Weakness (CWE)
CWE-20 · CWE-784
Tags
Published
24 Jun 2020
Updated
10 Sept 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
7.5 High 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N GitHub Advisory Database
  • CISA KEV Not listed.
  • EPSS 0.030, the 87th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 15:16 UTC First seen by agentprime
  2. 31 Oct 2026, 15:16 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.