CVE-2025-30157

Envoy crashes when HTTP ext_proc processes local replies

HIGH

7.5

CVSS Score

Published: March 21, 2025 at 02:49 PM UTC

Updated: June 17, 2026 at 09:08 AM UTC

1 product affected across 1 vendorEnvoy

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Severity

HIGH7.5

Exploit prediction

EPSS 0.4%

SSVC

PoC

Description

Envoy is a cloud-native high-performance edge/middle/service proxy. Prior to 1.33.1, 1.32.4, 1.31.6, and 1.30.10, Envoy's ext_proc HTTP filter is at risk of crashing if a local reply is sent to the external server due to the filter's life time issue. A known situation is the failure of a websocket handshake will trigger a local reply leading to the crash of Envoy. This vulnerability is fixed in 1.33.1, 1.32.4, 1.31.6, and 1.30.10.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Envoy · Envoyproxy

95%

v < 1.30.10v < 1.31.6v < 1.32.4v < 1.33.11.31.0 ≤ v < 1.31.61.32.0 ≤ v < 1.32.41.33.0

Affected range stops below 1.30.10, so it looks safe — our inference, not a vendor statement

Affected range stops below 1.31.6, so it looks safe — our inference, not a vendor statement

Affected range stops below 1.32.4, so it looks safe — our inference, not a vendor statement

Affected range stops below 1.33.1, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

x_refsource_MISCPatch

Source: [email protected]

https://github.com/envoyproxy/envoy/commit/8eda1b8ef5ba8663d16a737ab99458c039a9b53c

x_refsource_CONFIRMVendor Advisory

Source: [email protected]

https://github.com/envoyproxy/envoy/security/advisories/GHSA-cf3q-gqg7-3fm9

SSVC — Action Prioritization

SSVCPoCNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGH[email protected]

Attack Vector: NETWORK
Complexity: LOW
Privileges: NONE
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: NONE
Integrity: NONE
Availability: HIGH

Vector?

Quick Info

StatusANALYZED

CWE

CWE-460NVD-CWE-noinfo

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