Findings

CVE-2026-34475

Varnish Cache before 8.0.1 and Varnish Enterprise before 6.0.16r12, in certain unchecked req.url scenarios, mishandle URLs with a path of / for HTTP/1.1, potentially l…

Published Mar 27, 2026 · updated Jun 17, 2026 · varnish-software varnish enterprise

Varnish Cache before 8.0.1 and Varnish Enterprise before 6.0.16r12, in certain unchecked req.url scenarios, mishandle URLs with a path of / for HTTP/1.1, potentially leading to cache poisoning or authentication bypass.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Mar 27, 2026 · NIST NVD

    Detected

    Varnish Cache before 8.0.1 and Varnish Enterprise before 6.0.16r12, in certain unchecked req.url scenarios, mishandle URLs with a path of / for HTTP/1.1, potentially leading to cache poisoning or authentication bypass.

  2. Jun 17, 2026 · NIST NVD

    Updated

    Varnish Cache before 8.0.1 and Varnish Enterprise before 6.0.16r12, in certain unchecked req.url scenarios, mishandle URLs with a path of / for HTTP/1.1, potentially leading to cache poisoning or authentication bypass.

Affected

  • cpe varnish-software/varnish enterpriseversion unspecified
  • cpe varnish-software/varnish enterprise6.0.16
  • cpe vinyl-cache/vinyl cacheversion unspecified

Sources

  • CVE.orgVulnerability recordCVE-2026-34475

    Official CVE identifier

    cve.org
  • NIST NVDVulnerability recordCVE-2026-34475

    Varnish Cache before 8.0.1 and Varnish Enterprise before 6.0.16r12, in certain unchecked req.url scenarios, mishandle URLs with a path of / for HTTP/1.1, potentially leading to cache poisoning or authentication bypass.

    nvd.nist.gov

References