An issue was discovered in Envoy 1.14.0.
Priority LOW 36CWE-617Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-617.
Summary
An issue was discovered in Envoy 1.14.0. There is a remotely exploitable crash for HTTP2 Metadata, because an empty METADATA map triggers a Reachable Assertion.
Why it matters now
EPSS 0.01772 78th percentileScored 2026-11-07
Fix Fixed Red Hat: 2 advisories
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:envoyproxy:envoy:1.14.6:*:*:*:*:*:*:* | 1.14.6 | Vulnerable | envoyproxy |
| cpe:2.3:a:envoyproxy:envoy:1.15.3:*:*:*:*:*:*:* | 1.15.3 | Vulnerable | envoyproxy |
| cpe:2.3:a:envoyproxy:envoy:1.16.2:*:*:*:*:*:*:* | 1.16.2 | Vulnerable | envoyproxy |
| cpe:2.3:a:envoyproxy:envoy:1.17.1:*:*:*:*:*:*:* | 1.17.1 | Vulnerable | envoyproxy |
- cpe:2.3:a:envoyproxy:envoy:1.14.6:*:*:*:*:*:*:* Versions 1.14.6 Vulnerable ·envoyproxy
- cpe:2.3:a:envoyproxy:envoy:1.15.3:*:*:*:*:*:*:* Versions 1.15.3 Vulnerable ·envoyproxy
- cpe:2.3:a:envoyproxy:envoy:1.16.2:*:*:*:*:*:*:* Versions 1.16.2 Vulnerable ·envoyproxy
- cpe:2.3:a:envoyproxy:envoy:1.17.1:*:*:*:*:*:*:* Versions 1.17.1 Vulnerable ·envoyproxy
Remediation
Red Hat 2 advisories
- RHSA-2021:1322 Released 2021-04-22 · Red Hat rating ImportantRed Hat OpenShift Service Mesh 1.1.13 security update
- OpenShift Service Mesh 1.1 servicemesh-pilot-agent-1.1.13-3.el8, servicemesh-pilot-discovery-1.1.13-3.el8, servicemesh-proxy-1.1.13-1.el8
- RHSA-2021:1324 Released 2021-04-22 · Red Hat rating ImportantRed Hat OpenShift Service Mesh 2.0.3 security update
- OpenShift Service Mesh 2.0 servicemesh-proxy-2.0.3-1.el8
Vendor assessments
Red Hat
Red Hat rating: Important. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| OpenShift Service Mesh 1.1 | Fixed | RHSA-2021:1322 |
| OpenShift Service Mesh 2.0 | Fixed | RHSA-2021:1324 |
Not affected: 1 product
- OpenShift Service Mesh 1.1
Timeline
- 2026-10-02 Threatist record created from CVE-2021-29258
References
More envoyproxy Envoy vulnerabilities
- TI-2026-79288 Out-of-bounds write in Google Brotli decoder KEVCVSS 4.0CRITICAL 9.2
- TI-2023-23979 The HTTP/2 protocol allows a denial of service (server resource consumption) because… KEVCVSS 3.1HIGH 7.5
- TI-2024-20001 HTTP/2: CPU exhaustion due to CONTINUATION frame flood CVSS 3.1HIGH 7.5
- TI-2024-18524 HTTP/2: memory exhaustion due to CONTINUATION frame flood CVSS 3.1HIGH 7.5
- TI-2023-12215 Envoy client may fake the header `x-envoy-original-path` CVSS 3.1CRITICAL 9.1
- TI-2023-18002 Envoy vulnerable to OAuth2 credentials exploit with permanent validity CVSS 3.1CRITICAL 9.8
Sources
- CVE-2021-29258 · CVE Program
- CVE-2021-29258 · NVD
- FIRST EPSS
- CVE-2021-29258 · Red Hat security data · CC BY 4.0
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