CVE-2026-41246

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Source
https://cve.org/CVERecord?id=CVE-2026-41246
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-41246.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-41246
Aliases
Downstream
Related
Published
2026-04-23T18:44:39.907Z
Modified
2026-07-16T03:31:08.984498149Z
Severity
  • 8.1 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H CVSS Calculator
Summary
Contour: Lua code injection via Cookie Path Rewrite Policy
Details

Contour is a Kubernetes ingress controller using Envoy proxy. From v1.19.0 to before v1.33.4, v1.32.5, and v1.31.6, Contour's Cookie Rewriting feature is vulnerable to Lua code injection. An attacker with RBAC permissions to create or modify HTTPProxy resources can craft a malicious value in spec.routes[].cookieRewritePolicies[].pathRewrite.value or spec.routes[].services[].cookieRewritePolicies[].pathRewrite.value that results in arbitrary code execution in the Envoy proxy. The cookie rewriting feature is internally implemented using Envoy's HTTP Lua filter. User-controlled values are interpolated into Lua source code using Go text/template without sufficient sanitization. The injected code only executes when processing traffic on the attacker's own route, which they already control. However, since Envoy runs as shared infrastructure, the injected code can also read Envoy's xDS client credentials from the filesystem or cause denial of service for other tenants sharing the Envoy instance. This vulnerability is fixed in v1.33.4, v1.32.5, and v1.31.6.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-94"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/41xxx/CVE-2026-41246.json"
}
References

Affected packages

Git / github.com/projectcontour/contour

Affected ranges

Type
GIT
Repo
https://github.com/projectcontour/contour
Events
Introduced
644dddba5ce67673eb3d90dab44d681d32359bb6
Fixed
415bf10c9c99083f6428b738ce2dbdeceed2184a
Introduced
0d1b6666b7c0b1abd75880142bb52d2d80108ae5
Fixed
d908675ac6b180f1897ed3681c02d0fd29fa0e27
Introduced
3635b068e25d74b7089c272eefd6ccb6a08f2861
Fixed
6eb0dafc582ae5742301af846968c3a8e0cd4b52
Database specific 
{
    "cpe": "cpe:2.3:a:projectcontour:contour:*:*:*:*:*:kubernetes:*:*",
    "source": [
        "CPE_RANGE",
        "REFERENCES"
    ],
    "extracted_events": [
        {
            "introduced": "1.19.0"
        },
        {
            "fixed": "1.31.6"
        },
        {
            "introduced": "1.32.0"
        },
        {
            "fixed": "1.32.5"
        },
        {
            "introduced": "1.33.0"
        },
        {
            "fixed": "1.33.4"
        }
    ]
}

Affected versions

v1.*
v1.32.0
v1.32.1
v1.32.2
v1.32.3
v1.32.4
v1.33.0
v1.33.1
v1.33.2
v1.33.3

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-41246.json"