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Advisory record · GHSA-7gpj-mj4q-x62x

Pingora HTTP/2 server memory exhaustion through unbounded default header-list and concurrent-stream limits

CVSS 7.5 HighEPSS 0.0043 · 37th percentile

Published by the GitHub Advisory Database at 20 Oct 2026, 12:00 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
pingora-corecrates.io>=0.0.0-0, <0.8.10.8.1
Identifiers
GHSA-7gpj-mj4q-x62x · CVE-2026-105297 · RUSTSEC-2026-0389
Weakness (CWE)
CWE-770
Tags
Published
20 Oct 2026
Updated
26 Oct 2026

Machine-written summary

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

Pingora (crates.io pingora-core) versions before 0.8.1 are affected when HTTP/2 server limits are left at the h2 crate defaults, which means no limit on concurrent streams and a 16 MiB header-list size. A remote, unauthenticated client can open many streams on one connection with small header data and keep them open via flow control, exhausting server memory and possibly terminating the process. Upgrade to pingora-core 0.8.1 or later. If your application supplies its own H2Options, set max_header_list_size and max_concurrent_streams explicitly, since the new defaults do not apply to them.

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

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 (cloudflare)
  • CISA KEV Not listed.
  • EPSS 0.0043, the 37th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

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.