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Advisory record · GHSA-x9ff-22gv-65f4

Echo: BodyDump can discard BodyLimit overflow errors for unknown-length requests

CVSS 6.3 MediumEPSS 0.0039 · 32nd percentile

Published by the GitHub Advisory Database at 23 Oct 2026, 20:49 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
github.com/labstack/echo/v5Go>=5.0.0, <5.4.15.4.1
Identifiers
GHSA-x9ff-22gv-65f4 · CVE-2026-118263 · GO-2026-6844
Weakness (CWE)
CWE-252
Tags
Published
23 Oct 2026
Updated
5 Nov 2026

Machine-written summary

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

Echo v5 (github.com/labstack/echo/v5) versions 5.0.0 through 5.4.0 are affected. When the BodyDump middleware runs behind a BodyLimit, an unknown-length request such as a chunked HTTP/1.1 request can exceed the configured limit without an error, so the handler processes a truncated body and returns success. Upgrade to v5.4.1. As a workaround, disable BodyDump on affected routes or set its capture limit above the BodyLimit.

Written 1 Nov 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:N/VI:L/VA:N/SC:N/SI:N/SA:N CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0039, the 32nd percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 28 Oct 2026, 19:01 UTC Confirmed by the CVE List
  2. 28 Oct 2026, 19:17 UTC Confirmed by NVD
  3. 31 Oct 2026, 14:11 UTC First seen by agentprime
  4. 31 Oct 2026, 14:11 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.