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Advisory record · GHSA-wgh7-54f2-x98r

HTTP/2 HPACK integer overflow and buffer allocation

CVSS 7.5 HighEPSS 0.048 · 92nd percentile

Published by the GitHub Advisory Database at 10 Oct 2023, 21:16 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
org.eclipse.jetty.http2:http2-hpackMaven>=10.0.0, <10.0.16 || >=11.0.0, <11.0.16 || >=9.3.0, <9.4.5310.0.16, 11.0.16, 9.4.53
org.eclipse.jetty.http3:http3-qpackMaven>=10.0.0, <10.0.16 || >=11.0.0, <11.0.1610.0.16, 11.0.16
Identifiers
GHSA-wgh7-54f2-x98r · BIT-jenkins-2023-36478 · CVE-2023-36478
Weakness (CWE)
CWE-190 · CWE-400
Tags
Published
10 Oct 2023
Updated
10 Sept 2026

Machine-written summary

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

Versions of the org.eclipse.jetty.http2:http2-hpack package from 9.3.0 up to 9.4.53, from 10.0.0 up to 10.0.16, and from 11.0.0 up to 11.0.16 are affected, along with org.eclipse.jetty.http3:http3-qpack from 10.0.0 up to 10.0.16 and from 11.0.0 up to 11.0.16. A remote attacker can send crafted HTTP/2 headers with oversized or negative Huffman-coded lengths, causing a very large buffer allocation and possible out-of-memory denial of service. Upgrade to http2-hpack 9.4.53, 10.0.16 or 11.0.16, and http3-qpack 10.0.16 or 11.0.16. No workaround is listed.

Written 2 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
7.5 High 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.048, the 92nd percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 10 Oct 2023, 11:41 UTC Published by the maintainers as a GitHub repository advisory
  2. 31 Oct 2026, 14:18 UTC First seen by agentprime
  3. 31 Oct 2026, 14:18 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.