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HIGH severity

GHSA-gjcg-vrxg-xmgv

HIGH

GHSA-gjcg-vrxg-xmgv is a high-severity (CVSS 8.6) CWE-754 vulnerability in github.com/pomerium/pomerium. O3 Security confirms whether GHSA-gjcg-vrxg-xmgv is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.

Incorrect handling of H2 GOAWAY + SETTINGS frames

Also known asBIT-envoy-2021-39162CVE-2021-39162GO-2022-0933
Published
Sep 10, 2021
Updated
Feb 4, 2026
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Feb 4, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Real-World Exposure

1 pkg affected
🐹github.com/pomerium/pomerium

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Go packages — download data is not available via public APIs for these ecosystems.

Description

Envoy, which Pomerium is based on, can abnormally terminate if an H/2 GOAWAY and SETTINGS frame are received in the same IO event.

Impact

This can lead to a DoS in the presence of untrusted upstream servers.

Patches

0.15.1 contains an upgraded envoy binary with this vulnerability patched.

Workarounds

If only trusted upstreams are configured, there is not substantial risk of this condition being triggered.

References

envoy GSA envoy CVE envoy announcement

For more information

If you have any questions or comments about this advisory:

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🐹Gogithub.com/pomerium/pomeriumall versions0.15.1

Detection & mitigation playbook

Open-source dependency
  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/pomerium/pomerium. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.

  2. Fix

    Update github.com/pomerium/pomerium to 0.15.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-gjcg-vrxg-xmgv is resolved across your whole dependency graph.

  3. Workarounds

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

  4. How O3 protects you

    O3 pinpoints whether GHSA-gjcg-vrxg-xmgv is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.

Tailored to GHSA-gjcg-vrxg-xmgv. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

Frequently Asked Questions

Envoy, which Pomerium is based on, can abnormally terminate if an H/2 GOAWAY and SETTINGS frame are received in the same IO event. ### Impact This can lead to a DoS in the presence of untrusted *upstream* servers. ### Patches 0.15.1 contains an upgraded envoy binary with this vulnerability patched. ### Workarounds If only trusted upstreams are configured, there is not substantial risk of this condition being triggered. ### References [envoy GSA](https://github.com/envoyproxy/envoy/security/advisories/GHSA-j374-mjrw-vvp8) [envoy CVE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021
O3 Security · Impact-Aware SCA

Is GHSA-gjcg-vrxg-xmgv in your dependencies?

O3 detects GHSA-gjcg-vrxg-xmgv across Go dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.

GHSA-gjcg-vrxg-xmgv: Incorrect handling of… | O3 Security