CVE-2026-73513

high

Envoy is an open source edge and service proxy designed for cloud-native applications.

Vendor / product: Envoyproxy — envoy

Envoy is an open source edge and service proxy designed for cloud-native applications. Prior to 1.36.10, 1.37.6, 1.38.4, and 1.39.1, Envoy's optional oghttp2 upstream HTTP/2 codec accepts a response trailer HEADERS frame without END_STREAM. Envoy completes and deferred-deletes the ActiveRequest while oghttp2 keeps the stream open, leaving ClientStreamImpl with a dangling response_decoder_ reference. A later frame on the stream can dispatch through the freed object and crash the process. The relevant scope boundary is that the default nghttp2 codec rejects the malformed trailers, and the trigger is upstream-only with oghttp2 enabled. This issue is fixed in versions 1.36.10, 1.37.6, 1.38.4, and 1.39.1.

CVSS

7.5

7.5 (CVSS v3.1)

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Severity source: NVD CVSS v3.1 (security-advisories@github.com)

Timeline (UTC)

Published: 2026-09-21 20:17

Modified: 2026-10-05 14:08

NVD status: Analyzed

Last synced 2 days ago

Verified against the source API 2026-10-27 06:54 UTC

Exploitation

Not listed in CISA KEV (as of last catalog sync)

Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).

Affected products

envoyproxy / envoy <1.36.10, ≥1.37.0 <1.37.6, ≥1.38.0 <1.38.4, ≥1.39.0 <1.39.1

Weakness classification (CWE)

CWE-20 CWE-416

Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.

Mitigation & advisories

Vendor advisory: https://github.com/envoyproxy/envoy/security/advisories/GHSA-jjmm-fw8p-crpw

Patch / mitigation: https://github.com/envoyproxy/envoy/commit/0d33268d7d8cdc5c8ffef462e0cceefa56156b72

Patch / mitigation: https://github.com/envoyproxy/envoy/commit/3df69eeee220d6a4088cfdd3be79b55e2e6d3514

Patch / mitigation: https://github.com/envoyproxy/envoy/commit/c4610b6c85d72ed01e014c2a1aba2934a2b774e9

Patch / mitigation: https://github.com/envoyproxy/envoy/commit/e6963c6b64cd62aa8e078ef17c76052b6e33e82b

References

https://github.com/envoyproxy/envoy/commit/0d33268d7d8cdc5c8ffef462e0cceefa56156b72 security-advisories@github.com
https://github.com/envoyproxy/envoy/commit/3df69eeee220d6a4088cfdd3be79b55e2e6d3514 security-advisories@github.com
https://github.com/envoyproxy/envoy/commit/c4610b6c85d72ed01e014c2a1aba2934a2b774e9 security-advisories@github.com
https://github.com/envoyproxy/envoy/commit/e6963c6b64cd62aa8e078ef17c76052b6e33e82b security-advisories@github.com
https://github.com/envoyproxy/envoy/releases/tag/v1.37.6 security-advisories@github.com
https://github.com/envoyproxy/envoy/releases/tag/v1.38.4 security-advisories@github.com
https://github.com/envoyproxy/envoy/releases/tag/v1.39.1 security-advisories@github.com
https://github.com/envoyproxy/envoy/security/advisories/GHSA-jjmm-fw8p-crpw security-advisories@github.com
https://github.com/envoyproxy/envoy/security/advisories/GHSA-jjmm-fw8p-crpw 134c704f-9b21-4f2e-91b3-4a467353bcc0

Data sources

NVD CVE API 2.0 — fetched 2026-10-27 06:54 UTC · record ↗

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CVE-2026-73513

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