CVE-2026-6994

Envoy Query Parameter header_mutation.cc params.add injection

State: Published
Severity: 5.3 Medium
Published: Apr 25, 2026
Updated: Apr 27, 2026
Reserved: Apr 24, 2026

Description

A weakness has been identified in Envoy up to 1.33.0. Affected is the function params.add of the file source/extensions/filters/http/header_mutation/header_mutation.cc of the component Query Parameter Handler. This manipulation causes injection. Remote exploitation of the attack is possible. Patch name: f8f4f1e02fdc64ecd4acf2d903208dd7285ad3a4. It is suggested to install a patch to address this issue.

Scores

CVSS	Score	Vector	Source
4.0	5.3 Medium	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X	VulDB
3.1	6.3 Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:X/RL:O/RC:C	VulDB
3.0	6.3 Medium	CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:X/RL:O/RC:C	VulDB
2.0	6.5 Medium	AV:N/AC:L/Au:S/C:P/I:P/A:P/E:ND/RL:OF/RC:C	VulDB

Weaknesses

CWE-74 Injection
CWE-707 Improper Neutralization

Affected Products

Product	Versions
Envoyn/a	1.0Affected 1.1Affected 1.2Affected 1.3Affected 1.4Affected 1.5Affected 1.6Affected 1.7Affected 1.8Affected 1.9Affected 1.10Affected 1.11Affected 1.12Affected 1.13Affected 1.14Affected 1.15Affected 1.16Affected 1.17Affected 1.18Affected 1.19Affected 1.20Affected 1.21Affected 1.22Affected 1.23Affected 1.24Affected and 9 more versions

References

VDB-359546 | Envoy Query Parameter header_mutation.cc params.add injectionvdb-entrytechnical-description
VDB-359546 | CTI Indicators (IOB, IOC, TTP, IOA)signaturepermissions-required
Submit #797241 | Envoy >= 1.33.0 Injection (CWE-74)third-party-advisory
https://github.com/envoyproxy/envoy/pull/43502/issue-trackingpatch
https://github.com/envoyproxy/envoy/commit/f8f4f1e02fdc64ecd4acf2d903208dd7285ad3a4patch

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