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Advisory record · GHSA-q83h-524g-xf6h

h2 unbounded empty DATA frames

No CVSS score

Published by the GitHub Advisory Database at 17 Aug 2026, 12:00 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
h2crates.io>=0.0.0-0, <0.4.160.4.16
Identifiers
GHSA-q83h-524g-xf6h · RUSTSEC-2026-0258
Published
17 Aug 2026
Updated
12 Oct 2026

Machine-written summary

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

The h2 package, versions before 0.4.16, accepts and queues empty DATA frames without any limit. An attacker able to send HTTP/2 traffic to a server using the affected version can cause unbounded memory growth when streams are not actively drained, or a panic if the length overflows. Upgrade h2 to version 0.4.16 or later.

Written 3 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

No source has published a CVSS score for this record yet.

  • CISA KEV Not listed.
  • EPSS No score.

Timeline

  1. 31 Oct 2026, 14:24 UTC First seen by agentprime
  2. 31 Oct 2026, 14:24 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.