CVE-2026-50052

lowpriority · track · 0EPSS 0.004 · 32 %ileDEEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.38% (32nd) EPSS

CVSS 2.3 · low

Is it mine?

9 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · cert_bund

EPSS · scored 2026-10-27

In Vinyl Cache before 9.0.1 and Varnish Cache before 9.0.3, a deficiency in HTTP/2 request parsing can be exploited to launch a backend request desync attack (request smuggling), which in turn can be used for cache poisoning, authentication bypass, or possibly even information disclosure and manipulation. The attack vector only exists if HTTP/2 support is enabled by setting the feature parameter to contain +http2. HTTP/2 support is disabled by default.

cvss

Technical severity, 0–10. One row per scoring source.

2.3

010

base score 0–10 · higher = more severe · hover a vector to decode

v4.02.3lowCVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N/S:N/AU:N/R:A/V:D/RE:L/U:Greensecondary · ENISA EU

v4.02.3lowCVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:N/AU:N/R:A/V:D/RE:L/U:Greensecondary · cve@mitre.org US

v4.00.6lowCVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:N/AU:N/R:A/V:D/RE:L/U:Greensecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-444US

affected products (9)

Products and version ranges known to be affected.

Fedora Linuxall versionscert_bundDEcpe:/o:fedoraproject:fedora:-
Gentoo Linuxall versionscert_bundDEcpe:/o:gentoo:linux:-
Open Source Varnish HTTP Cache≤ LTS <6.0.18cert_bundDE
Open Source Varnish HTTP Cache< 8.0.2cert_bundDE
Open Source Varnish HTTP Cache< 9.0.3cert_bundDE
Varnish Cache (pre split)≤ 6.0.14 ≤6.0.17enisa_euvdEU
Varnish Cache (pre split)≤ 7.6.0 ≤8.0.1enisa_euvdEU
Varnish Cache by Varnish Software≤ 9.0.0 ≤9.0.2enisa_euvdEU
Vinyl Cache≤ 9.0.0enisa_euvdEU

advisories (1)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-1576Varnish HTTP Cache: Schwachstelle ermöglicht Manipulation von Dateien, Offenlegung von Informationen und Umgehen von SicherheitsvrkehrungenDeutsch2026-05-18csaf · cert_bundDE
Ein Angreifer kann eine Schwachstelle in Varnish HTTP Cache ausnutzen, um Dateien zu manipulieren, um Informationen offenzulegen, und um Sicherheitsvorkehrungen zu umgehen.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cert_bund NVD CVE.org MITRE

published 2026-06-03modified 2026-07-22

references (5)

External citations — patches, advisories, analysis.

scry

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