VulnSocial

CVE-2026-34475Disclosure(varnish-software / varnish_enterprise)

LOWCVSS 9.8 · CRITICAL

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Patch varnish-software varnish_enterprise systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD description

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.

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1.0/ 10 priority

Sources & remediation

Vendor / third-party advisories
Weakness type (CWE)
CWE-180

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

STABLE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • varnish_enterprise
  • vinyl_cache

Threat summary

  • Patch or workaround signal is available
  • 2 mentions across 2 observed days
  • Momentum state: stable

What's happening

  • Patch or workaround mentioned in 1 signal
  • Technical details provided in 1 signal
  • Disclosure: 1 classified signal
  • Peaked 1d ago at 1 mentions (2026-03-28); latest day: 1
  • 2 total mentions across 2 days

Affected systems

Vendors
varnish-softwarevinyl-cache
Products
varnish_enterprisevinyl_cache

1 version affected across 2 products

Deep dive

Activity timeline2 mentions / 2d
00111Mentions · 2026-03-28: 1Mentions · 2026-06-13: 1Patch / Workaround · 2026-06-13: 1Technical Details · 2026-03-28: 103-2806-13
Signal classification2 categories
Disclosure
150.0%
Patch
150.0%
Referenced assets2 URLs
Classification over time
DateTotalLabels
2026-03-281
Disclosure1
2026-06-131
Patch1
Full discourse2 posts
  • ThreatCluster@threatcluster
    Patch

    Fedora 44 shipped Varnish 8.0.2 as a security release fixing VSV00019 and referencing earlier VSV00018/CVE-2026-34475 in multiple dependent modules, according to a Fedora advisory. https://threatcluster.io/cluster/fedora-44-varnish-802-security-fix-addresses-vulnerability-v-0353a9c4

    Post summary

    Fedora 44’s update includes Varnish 8.0.2, a security release that addresses the VSV00019 bug and references the earlier CVE‑2026‑34475, providing a patch for affected systems.

    0000057
    330 followersView on X
  • CVE@CVEnew
    Disclosure

    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 … https://www.cve.org/CVERecord?id=CVE-2026-34475

    Post summary

    The text discloses CVE‑2026‑34475, detailing a URL-handling flaw in certain Varnish Cache versions, but it provides no PoC, exploit, or mitigation information.

    00000132
    56.9K followersView on X
CPE platform detail13 entries

13 of 13 entries

PartVendorProductVersionTarget SWTarget HW
Appvarnish-softwarevarnish_enterprise---
Appvarnish-softwarevarnish_enterprise6.0.16--
Appvarnish-softwarevarnish_enterprise6.0.16--
Appvarnish-softwarevarnish_enterprise6.0.16--
Appvarnish-softwarevarnish_enterprise6.0.16--
Appvarnish-softwarevarnish_enterprise6.0.16--
Appvarnish-softwarevarnish_enterprise6.0.16--
Appvarnish-softwarevarnish_enterprise6.0.16--
Appvarnish-softwarevarnish_enterprise6.0.16--
Appvarnish-softwarevarnish_enterprise6.0.16--
Appvarnish-softwarevarnish_enterprise6.0.16--
Appvarnish-softwarevarnish_enterprise6.0.16--
Appvinyl-cachevinyl_cache---

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