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.

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact Low

Vulnerable System Integrity Impact Low

Vulnerable System Availability Impact Low

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact Low

User Interaction None

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact Low

User Interaction None

Access Vector Network

Access Complexity Low

Authentication Single

Confidentiality Impact Partial

Integrity Impact Partial

Availability Impact Partial

This CVE is not in the KEV list.

The EPSS score is 0.00049.

Exploitation none

Automatable no

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
n/a Envoy affected
Version Status Constraints
1.0 affected —
1.1 affected —
1.2 affected —
1.3 affected —
1.4 affected —
1.5 affected —
1.6 affected —
1.7 affected —
1.8 affected —
1.9 affected —
1.10 affected —
1.11 affected —
1.12 affected —
1.13 affected —
1.14 affected —
1.15 affected —
1.16 affected —
1.17 affected —
1.18 affected —
1.19 affected —
1.20 affected —
1.21 affected —
1.22 affected —
1.23 affected —
1.24 affected —
1.25 affected —
1.26 affected —
1.27 affected —
1.28 affected —
1.29 affected —
1.30 affected —
1.31 affected —
1.32 affected —
1.33.0 affected —

No data.

No data.

OpenCVE Enrichment is a feature of OpenCVE that uses AI to automatically link vendors and products to CVEs. Learn more on GitHub.

Vendors Products
Envoyproxy Subscribe
Envoy Subscribe

Project Subscriptions

Vendors Products
Envoyproxy Subscribe
Envoy Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/envoyproxy/envoy/commit/f8f4f1e02fdc64ecd4acf2d903208dd7285ad3a4 cve-icon cve-icon cve-icon
https://github.com/envoyproxy/envoy/pull/43502/ cve-icon cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2026-6994 cve-icon
https://vuldb.com/submit/797241 cve-icon cve-icon cve-icon
https://vuldb.com/vuln/359546 cve-icon cve-icon cve-icon
https://vuldb.com/vuln/359546/cti cve-icon cve-icon cve-icon
https://www.cve.org/CVERecord?id=CVE-2026-6994 cve-icon
History

Wed, 06 May 2026 00:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-915
References
Metrics threat_severity

None

 threat_severity

Moderate

Mon, 27 Apr 2026 19:00:00 +0000

Type Values Removed Values Added
First Time appeared Envoyproxy
Envoyproxy envoy
Vendors & Products Envoyproxy
Envoyproxy envoy

Mon, 27 Apr 2026 18:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Sat, 25 Apr 2026 19:15:00 +0000

Type Values Removed Values Added
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.
Title Envoy Query Parameter header_mutation.cc params.add injection
Weaknesses CWE-707
CWE-74
References
Metrics cvssV2_0

{'score': 6.5, 'vector': 'AV:N/AC:L/Au:S/C:P/I:P/A:P/E:ND/RL:OF/RC:C'}

cvssV3_0

{'score': 6.3, 'vector': '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'}

cvssV3_1

{'score': 6.3, 'vector': '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'}

cvssV4_0

{'score': 5.3, 'vector': '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'}

Projects

Sign in to view the affected projects.

cve-icon MITRE

Status: PUBLISHED

Assigner: VulDB

Published:

Updated: 2026-04-27T17:17:35.083Z

Reserved: 2026-04-24T19:49:39.070Z

Link: CVE-2026-6994

cve-icon Vulnrichment

Updated: 2026-04-27T17:17:20.969Z

cve-icon NVD

Status : Deferred

Published: 2026-04-25T19:16:00.360

Modified: 2026-04-27T18:42:11.700

Link: CVE-2026-6994

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-04-25T19:00:19Z

Links: CVE-2026-6994 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-05-06T02:00:12Z

Weaknesses