CVE-2026-6994 | Envoy up to 1.33.0 Query Parameter header_mutation.cc params.add injection (ID 43502)

VDB-359546 · SUBMIT #797241 · CVE-2026-6994 ENVOY UP TO 1.33.0 QUERY PARAMETER HEADER_MUTATION.CC PARAMS.ADD INJECTION HISTORYDIFFRELATEJSONXMLCTI Summaryinfo A vulnerability described as critical has been identified in Envoy up to 1.33.0. Affected by this vulnerability is the function params.add of the file source/extensions/filters/http/header_mutation/header_mutation.cc of the component Query Parameter Handler. Such manipulation leads to injection. This vulnerability is documented as CVE-2026-6994. The attack can be executed remotely. There is not any exploit available. A patch should be applied to remediate this issue. Detailsinfo A vulnerability was found in Envoy up to 1.33.0 and classified as critical. Affected by this issue is the function params.add of the file source/extensions/filters/http/header_mutation/header_mutation.cc of the component Query Parameter Handler. The manipulation with an unknown input leads to a injection vulnerability. Using CWE to declare the problem leads to CWE-74. The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component. Impacted is confidentiality, integrity, and availability. The advisory is available at github.com. This vulnerability is handled as CVE-2026-6994. The exploitation is known to be easy. The attack may be launched remotely. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1055 by the MITRE ATT&CK project. Applying the patch f8f4f1e02fdc64ecd4acf2d903208dd7285ad3a4 is able to eliminate this problem. The bugfix is ready for download at github.com. Productinfo Name Envoy Version 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 1.10 1.11 1.12 1.13 1.14 1.15 1.16 1.17 1.18 1.19 1.20 1.21 1.22 1.23 1.24 1.25 1.26 1.27 1.28 1.29 1.30 1.31 1.32 1.33.0 License free CPE 2.3info 🔒 🔒 🔒 CPE 2.2info 🔒 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 6.3 VulDB Meta Temp Score: 6.0 VulDB Base Score: 6.3 VulDB Temp Score: 6.0 VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Injection CWE: CWE-74 / CWE-707 / CWE-20 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: Patch Status: 🔍 0-Day Time: 🔒 Patch: f8f4f1e02fdc64ecd4acf2d903208dd7285ad3a4 Timelineinfo 04/24/2026 Advisory disclosed 04/24/2026 +0 days VulDB entry created 04/24/2026 +0 days VulDB entry last update Sourcesinfo Advisory: 43502 Status: Confirmed CVE: CVE-2026-6994 (🔒) GCVE (CVE): GCVE-0-2026-6994 GCVE (VulDB): GCVE-100-359546 Entryinfo Created: 04/24/2026 21:54 Changes: 04/24/2026 21:54 (56) Complete: 🔍 Submitter: lukefr09 Cache ID: 99:575:101 Submitinfo Accepted Submit #797241: Envoy >= 1.33.0 Injection (CWE-74) (by lukefr09) Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸