CVE-2026-6994 | THREATINT

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.

PUBLISHED Reserved 2026-04-24 | Published 2026-04-25 | Updated 2026-04-27 | Assigner VulDB

MEDIUM: 5.3CVSS: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

MEDIUM: 6.3CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:X/RL:O/RC:C

MEDIUM: 6.3CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:X/RL:O/RC:C

6.5AV:N/AC:L/Au:S/C:P/I:P/A:P/E:ND/RL:OF/RC:C

Problem types

Injection

Improper Neutralization

Timeline

2026-04-24:	Advisory disclosed
2026-04-24:	VulDB entry created
2026-04-24:	VulDB entry last update

Credits

lukefr09 (VulDB User) reporter

References

vuldb.com/vuln/359546 (VDB-359546 | Envoy Query Parameter header_mutation.cc params.add injection) vdb-entry technical-description

vuldb.com/vuln/359546/cti (VDB-359546 | CTI Indicators (IOB, IOC, TTP, IOA)) signature permissions-required

vuldb.com/submit/797241 (Submit #797241 | Envoy >= 1.33.0 Injection (CWE-74)) third-party-advisory

github.com/envoyproxy/envoy/pull/43502/ issue-tracking patch

github.com/...ommit/f8f4f1e02fdc64ecd4acf2d903208dd7285ad3a4 patch

cve.org (CVE-2026-6994)

nvd.nist.gov (CVE-2026-6994)

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