CVE-2026-34475

MEDIUMNVD 5.45.4—

5.4

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.

CVSS v3: 5.4
EG Score: 5.4(medium)
EPSS: 21.2%
KEV: Not listed

Published

March 27, 2026

Last Modified

April 22, 2026

References (1)

cve@mitrehttps://vinyl-cache.org/security/VSV00018.html

Data Freshness Timeline

(refreshed 16× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-05-31 22:30 UTCepss_batch
2026-05-31 22:30 UTCepss_batch
2026-05-31 00:16 UTCepss_batch
2026-05-31 00:16 UTCepss_batch
2026-05-31 00:16 UTCepss_batch
2026-05-29 13:44 UTCepss_batch
2026-05-29 13:44 UTCepss_batch
2026-05-28 13:44 UTCepss_batch
2026-05-28 13:44 UTCepss_batch
2026-05-28 13:44 UTCepss_batch
2026-05-27 13:40 UTCepss_batch
2026-05-27 13:40 UTCepss_batch
2026-05-27 13:40 UTCepss_batch
2026-05-26 13:44 UTCepss_batch
2026-05-26 07:18 UTCepss_batch
2026-05-26 07:18 UTCepss_batch
2026-05-20 22:38 UTCepss_batch
2026-05-20 22:38 UTCepss_batch
2026-05-20 20:02 UTCEG score recompute
2026-05-20 20:02 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2026-34475?

CVE-2026-34475 is a medium vulnerability published on March 27, 2026. 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.

When was CVE-2026-34475 disclosed?

CVE-2026-34475 was first published in the National Vulnerability Database on March 27, 2026, with the most recent update on April 22, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2026-34475 actively exploited?

CVE-2026-34475 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 21.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2026-34475?

CVE-2026-34475 has a CVSS v3 base score of 5.4 (NVD).

How do I remediate CVE-2026-34475?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-34475, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-34475

Explore →

Is Your Infrastructure Affected by CVE-2026-34475?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs

CVE-2026-34475

📅 Published

🔄 Last Modified

🔗 References (1)