CVSS 3.1
7.5 highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HCVE-2021-39204
High (7.5). EPSS 1.7% chance of exploitation in the next 30 days. Fixed in github.com/pomerium/pomerium 0.14.8, 0.15.1.
Pomerium is an open source identity-aware access proxy. Envoy, which Pomerium is based on, incorrectly handles resetting of HTTP/2 streams with excessive complexity. This can lead to high CPU utilization when a large number of streams are reset. This can result in a DoS condition. Pomerium versions 0.14.8 and 0.15.1 contain an upgraded envoy binary with this vulnerability patched.
Severity
- EPSS
- 1.7% chance of exploitation in the next 30 days; higher than 76% of CVEs (scores of 2026-10-31)
- CWE
- CWE-834
- Published
- Modified
- Record from
- the NVD, synced
Affected
- envoyproxy:envoy
- pomerium:pomerium
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-5wjf-62hw-q78r | Go | github.com/pomerium/pomerium | <0.14.8 | 0.14.8 |
| GHSA-5wjf-62hw-q78r | Go | github.com/pomerium/pomerium | >=0.15.0 <0.15.1 | 0.15.1 |
References
- https://github.com/envoyproxy/envoy/security/advisories/GHSA-3xh3-33v5-chcc
- https://github.com/pomerium/pomerium/security/advisories/GHSA-5wjf-62hw-q78r
- https://groups.google.com/g/envoy-announce/c/5xBpsEZZDfE/m/wD05NZBbAgAJ
- https://github.com/envoyproxy/envoy/security/advisories/GHSA-3xh3-33v5-chcc
- https://github.com/pomerium/pomerium/security/advisories/GHSA-5wjf-62hw-q78r