Low
CVE-2026-50052
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…
Tag: Varnish
All CVEs associated with "Varnish". Page 1/1 • 41 CVEs.
Subscribe CVEs: RSS for “Varnish” · RSS (High+Critical only)
About “Varnish”
A curated feed of “Varnish”-related CVEs appears below. We currently track 41 CVEs for this tag (all time). In the last 365 days, 11 were published. Average CVSS is 5.9 (all time; 4.8 over 365d), and 39% are rated High/Critical (all time). Top CWEs (last 365 days): CWE-862 - Missing Authorization, CWE-670 - Always-Incorrect Control Flow Implementation, CWE-444 - Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling').
In our taxonomy this topic maps to a LOW impact class. Databases, proxies, and web servers often need coordinated restarts and config checks. Patch only modules you deploy, verify TLS and authentication, and tune limits. Use the filters below to sort by CVSS, risk and CWE. Each detail page highlights vendor advisories and mitigation tips.
CVEs tagged with this topic. Filters apply to the whole list (loaded from JSON).
CVSS ≥ 0.0
2026-06-03
2026-04-12
Medium
CVE-2026-40396
Varnish Cache 9 before 9.0.1 allows a "workspace overflow" denial of service (daemon panic) after timeout_linger. A malicious client could send an HTTP/1 request, wait long enough until the session r…
Medium
CVE-2026-40395
Varnish Enterprise before 6.0.16r12 allows a "workspace overflow" denial of service (daemon panic) for shared VCL. The headerplus.write_req0() function from vmod_headerplus updates the underlying req…
Medium
CVE-2026-40394
Varnish Cache 9 before 9.0.1 and Varnish Enterprise before 6.0.16r11 allows a "workspace overflow" denial of service (daemon panic) for certain amounts of prefetched data. The setup of an HTTP/2 sess…
2026-03-27
Medium
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 leading to cache poisoning or aut…
2026-02-19
Medium
CVE-2025-13864
The Breeze - WordPress Cache Plugin plugin for WordPress is vulnerable to unauthorized cache clearing in all versions up to, and including, 2.2.21. This is due to the REST API endpoint `/wp-json/bree…
2026-01-23
Medium
CVE-2026-24525
Missing Authorization vulnerability in CloudPanel CLP Varnish Cache clp-varnish-cache allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects CLP Varnish Cache: fro…
2025-12-31
Medium
CVE-2025-62126
Insertion of Sensitive Information Into Sent Data vulnerability in Razvan Stanga Varnish/Nginx Proxy Caching vcaching allows Retrieve Embedded Sensitive Data.This issue affects Varnish/Nginx Proxy Ca…
2025-12-09
Medium
CVE-2025-62867
Missing Authorization vulnerability in ergonet Ergonet Cache ergonet-varnish-cache allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Ergonet Cache: from n/a t…
2025-09-05
High
CVE-2025-58807
Cross-Site Request Forgery (CSRF) vulnerability in Dsingh Purge Varnish Cache purge-varnish allows Stored XSS.This issue affects Purge Varnish Cache: from n/a through <= 2.6.
2025-08-28
Medium
CVE-2025-48360
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Razvan Stanga Varnish/Nginx Proxy Caching vcaching allows Stored XSS.This issue affects Varnish/N…
2025-05-13
Medium
CVE-2025-47905
Varnish Cache before 7.6.3 and 7.7 before 7.7.1, and Varnish Enterprise before 6.0.13r14, allow client-side desync via HTTP/1 requests, because the product incorrectly permits CRLF to be skipped to d…
2025-03-31
High
CVE-2025-31616
Cross-Site Request Forgery (CSRF) vulnerability in AdminGeekZ Varnish WordPress varnish-wp allows Cross Site Request Forgery.This issue affects Varnish WordPress: from n/a through <= 1.7.
2025-03-21
Medium
CVE-2025-30347
Varnish Enterprise before 6.0.13r13 allows remote attackers to obtain sensitive information via an out-of-bounds read for range requests on ephemeral MSE4 stevedore objects.
Medium
CVE-2025-30346
Varnish Cache before 7.6.2 and Varnish Enterprise before 6.0.13r10 allow client-side desync via HTTP/1 requests.
2025-01-09
Medium
CVE-2024-13269
Insertion of Sensitive Information Into Sent Data vulnerability in Drupal Advanced Varnish allows Forceful Browsing.This issue affects Advanced Varnish: from 0.0.0 before 4.0.11.
2024-03-24
High
CVE-2024-30156
Varnish Cache before 7.3.2 and 7.4.x before 7.4.3 (and before 6.0.13 LTS), and Varnish Enterprise 6 before 6.0.12r6, allows credits exhaustion for an HTTP/2 connection control flow window, aka a Brok…
2023-08-23
Medium
CVE-2023-41104
libvmod-digest before 1.0.3, as used in Varnish Enterprise 6.0.x before 6.0.11r5, has an out-of-bounds memory access during base64 decoding, leading to both authentication bypass and information disc…
2023-04-06
Medium
CVE-2023-1929
The WP Fastest Cache plugin for WordPress is vulnerable to unauthorized data modification due to a missing capability check on the wpfc_purgecache_varnish_callback function in versions up to, and inc…
Medium
CVE-2023-1920
The WP Fastest Cache plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 1.1.2. This is due to missing or incorrect nonce validation on the wpfc_purgeca…
2022-11-09
High
CVE-2022-45060
An HTTP Request Forgery issue was discovered in Varnish Cache 5.x and 6.x before 6.0.11, 7.x before 7.1.2, and 7.2.x before 7.2.1. An attacker may introduce characters through HTTP/2 pseudo-headers t…
High
CVE-2022-45059
An issue was discovered in Varnish Cache 7.x before 7.1.2 and 7.2.x before 7.2.1. A request smuggling attack can be performed on Varnish Cache servers by requesting that certain headers are made hop-…
2022-08-11
High
CVE-2022-38150
In Varnish Cache 7.0.0, 7.0.1, 7.0.2, and 7.1.0, it is possible to cause the Varnish Server to assert and automatically restart through forged HTTP/1 backend responses. An attack uses a crafted reaso…
2022-03-09
Medium
CVE-2022-24745
Shopware is an open commerce platform based on the Symfony php Framework and the Vue javascript framework. In affected versions guest sessions are shared between customers when HTTP cache is enabled.…
2022-01-28
Medium
CVE-2022-23599
Products.ATContentTypes are the core content types for Plone 2.1 - 4.3. Versions of Plone that are dependent on Products.ATContentTypes prior to version 3.0.6 are vulnerable to reflected cross site s…
2022-01-26
Critical
CVE-2022-23959
In Varnish Cache before 6.6.2 and 7.x before 7.0.2, Varnish Cache 6.0 LTS before 6.0.10, and and Varnish Enterprise (Cache Plus) 4.1.x before 4.1.11r6 and 6.0.x before 6.0.9r4, request smuggling can…
2021-07-14
Medium
CVE-2021-36740
Varnish Cache, with HTTP/2 enabled, allows request smuggling and VCL authorization bypass via a large Content-Length header for a POST request. This affects Varnish Enterprise 6.0.x before 6.0.8r3, a…
2021-03-16
Medium
CVE-2021-28543
Varnish varnish-modules before 0.17.1 allows remote attackers to cause a denial of service (daemon restart) in some configurations. This does not affect organizations that only install the Varnish Ca…
2020-04-08
High
CVE-2020-11653
An issue was discovered in Varnish Cache before 6.0.6 LTS, 6.1.x and 6.2.x before 6.2.3, and 6.3.x before 6.3.2. It occurs when communication with a TLS termination proxy uses PROXY version 2. There…
High
CVE-2019-20637
An issue was discovered in Varnish Cache before 6.0.5 LTS, 6.1.x and 6.2.x before 6.2.2, and 6.3.x before 6.3.1. It does not clear a pointer between the handling of one client request and the next re…
2020-02-12
High
CVE-2013-4090
Varnish HTTP cache before 3.0.4: ACL bug
2019-09-03
High
CVE-2019-15892
An issue was discovered in Varnish Cache before 6.0.4 LTS, and 6.1.x and 6.2.x before 6.2.1. An HTTP/1 parsing failure allows a remote attacker to trigger an assert by sending crafted HTTP/1 requests…
2018-02-19
Medium
CVE-2018-5763
An issue was discovered in OXID eShop Enterprise Edition before 5.3.7 and 6.x before 6.0.1. By entering specially crafted URLs, an attacker is able to bring the shop server to a standstill and hence,…
2017-11-16
Critical
CVE-2017-8807
vbf_stp_error in bin/varnishd/cache/cache_fetch.c in Varnish HTTP Cache 4.1.x before 4.1.9 and 5.x before 5.2.1 allows remote attackers to obtain sensitive information from process memory because a V…
2017-08-04
High
CVE-2017-12425
An issue was discovered in Varnish HTTP Cache 4.0.1 through 4.0.4, 4.1.0 through 4.1.7, 5.0.0, and 5.1.0 through 5.1.2. A wrong if statement in the varnishd source code means that particular invalid…
2016-04-25
High
CVE-2015-8852
Varnish 3.x before 3.0.7, when used in certain stacked installations, allows remote attackers to inject arbitrary HTTP headers and conduct HTTP response splitting attacks via a header line terminated…
2014-05-08
Low
CVE-2013-0345
varnish 3.0.3 uses world-readable permissions for the /var/log/varnish/ directory and the log files in the directory, which allows local users to obtain sensitive information by reading the files. N…
2013-11-01
Medium
CVE-2013-4484
Varnish before 3.0.5 allows remote attackers to cause a denial of service (child-process crash and temporary caching outage) via a GET request with trailing whitespace characters and no URI.
2013-03-27
Medium
CVE-2013-0325
Multiple cross-site scripting (XSS) vulnerabilities in the Varnish module 6.x-1.x before 6.x-1.2 and 7.x-1.x before 7.x-1.0-beta2 for Drupal allow remote attackers to inject arbitrary web script or H…
2010-04-05
High
CVE-2009-2936
The Command Line Interface (aka Server CLI or administration interface) in the master process in the reverse proxy server in Varnish before 2.1.0 does not require authentication for commands received…
2010-01-13
Critical
CVE-2009-4488
Varnish 2.0.6 writes data to a log file without sanitizing non-printable characters, which might allow remote attackers to modify a window's title, or possibly execute arbitrary commands or overwrite…