varnish cache project CVEs

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Overview 14 matches · 1 in Waratek scope · 0 protected · 1 exploited · 1 CISA KEV · 1 public PoC · 1 EPSS ≥ 0.5

14matches 1in Waratek scope7.1% 0protected0.0% 1exploited7.1% 1CISA KEV7.1% 1public PoC7.1% 1EPSS ≥ 0.57.1%

Protected by Waratek 0 0.0% Rule in development 0 0.0% Mitigation candidate 1 7.1% No exploit published 0 0.0% Outside Waratek scope 0 0.0% Not applicable 13 92.9% Withdrawn CVE 0 0.0%

Critical 2 14.3% High 8 57.1% Medium 3 21.4% Low 1 7.1% None 0 0.0% Unknown 0 0.0%

blocked by ARMR today 0 0.0% partly blocked 0 0.0% not blocked 14 100.0% not established 0 0.0% unrecorded 0 0.0%

Exploited 1 7.1% Working exploit published 0 0.0% Proof of concept only 0 0.0% Forecast only 0 0.0% No public exploit 13 92.9%

split by StatusSeverityProtectionExploit maturity peak 4 / year

20131 Not applicable1 Medium1 not blocked1 No public exploit1 20141 Not applicable1 Low1 not blocked1 No public exploit1 20150 20161 Not applicable1 High1 not blocked1 No public exploit1 20172 Not applicable2 Critical1 High1 not blocked2 No public exploit2 20180 20191 Not applicable1 High1 not blocked1 No public exploit1 20201 Not applicable1 High1 not blocked1 No public exploit1 20211 Not applicable1 Medium1 not blocked1 No public exploit1 20224 Not applicable4 Critical1 High3 not blocked4 No public exploit4 20231 Mitigation candidate1 High1 not blocked1 Exploited1 20240 20251 Not applicable1 Medium1 not blocked1 No public exploit1

2013201520172019202120232025

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CVE	Severity	Published▾	Status	Exploitation	Description
CVE-2025-30346	Medium	2025-03-21	Not applicable	No public exploit	Varnish Cache before 7.6.2 and Varnish Enterprise before 6.0.13r10 allow client-side desync via HTTP/1 requests.
CVE-2023-44487	High	2023-10-10	Mitigation candidate	Exploited	The HTTP/2 protocol allows a denial of service (server resource consumption) because request cancellation can reset many streams quickly, as exploited in the wild in August through October 2023.
CVE-2022-45060	High	2022-11-09	Not applicable	No public exploit	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 that are invalid in the context of an HTTP/1 request line, causing the Varnish server to produce invalid HTTP/1 requests to the backend. This could, in turn, be used to exploit vulnerabilities in a server behind the Varnish server. Note: the 6.0.x LTS series (before 6.0.11) is affected.
CVE-2022-45059	High	2022-11-09	Not applicable	No public exploit	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-by-hop, preventing the Varnish Cache servers from forwarding critical headers to the backend.
CVE-2022-38150	High	2022-08-11	Not applicable	No public exploit	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 reason phrase of the backend response status line. This is fixed in 7.0.3 and 7.1.1.
CVE-2022-23959	Critical	2022-01-26	Not applicable	No public exploit	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 occur for HTTP/1 connections.
CVE-2021-36740	Medium	2021-07-14	Not applicable	No public exploit	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, and Varnish Cache 5.x and 6.x before 6.5.2, 6.6.x before 6.6.1, and 6.0 LTS before 6.0.8.
CVE-2013-4090	High	2020-02-12	Not applicable	No public exploit	Varnish HTTP cache before 3.0.4: ACL bug
CVE-2019-15892	High	2019-09-03	Not applicable	No public exploit	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. The assert will cause an automatic restart with a clean cache, which makes it a Denial of Service attack.
CVE-2017-8807	Critical	2017-11-16	Not applicable	No public exploit	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 VFP_GetStorage buffer is larger than intended in certain circumstances involving -sfile Stevedore transient objects.
CVE-2017-12425	High	2017-08-04	Not applicable	No public exploit	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 requests from the client can trigger an assert, related to an Integer Overflow. This causes the varnishd worker process to abort and restart, losing the cached contents in the process. An attacker can therefore crash the varnishd worker process on demand and effectively keep it from serving content - a Denial-of-Service attack. The specific source-code filename containing the incorrect statement varies across releases.
CVE-2015-8852	High	2016-04-25	Not applicable	No public exploit	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 by a \r (carriage return) character in conjunction with multiple Content-Length headers in an HTTP request.
CVE-2013-0345	Low	2014-05-08	Not applicable	No public exploit	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. NOTE: some of these details are obtained from third party information.
CVE-2013-4484	Medium	2013-11-01	Not applicable	No public exploit	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.

CVE

Severity

Published▾

Status

Exploitation

Description

CVE-2025-30346

Medium

2025-03-21

Not applicable

No public exploit

Varnish Cache before 7.6.2 and Varnish Enterprise before 6.0.13r10 allow client-side desync via HTTP/1 requests.

CVE-2023-44487

High

2023-10-10

Mitigation candidate

Exploited

The HTTP/2 protocol allows a denial of service (server resource consumption) because request cancellation can reset many streams quickly, as exploited in the wild in August through October 2023.

CVE-2022-45060

High

2022-11-09

Not applicable

No public exploit

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 that are invalid in the context of an HTTP/1 request line, causing the Varnish server to produce invalid HTTP/1 requests to the backend. This could, in turn, be used to exploit vulnerabilities in a server behind the Varnish server. Note: the 6.0.x LTS series (before 6.0.11) is affected.

CVE-2022-45059

High

2022-11-09

Not applicable

No public exploit

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-by-hop, preventing the Varnish Cache servers from forwarding critical headers to the backend.

CVE-2022-38150

High

2022-08-11

Not applicable

No public exploit

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 reason phrase of the backend response status line. This is fixed in 7.0.3 and 7.1.1.

CVE-2022-23959

Critical

2022-01-26

Not applicable

No public exploit

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 occur for HTTP/1 connections.

CVE-2021-36740

Medium

2021-07-14

Not applicable

No public exploit

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, and Varnish Cache 5.x and 6.x before 6.5.2, 6.6.x before 6.6.1, and 6.0 LTS before 6.0.8.

CVE-2013-4090

High

2020-02-12

Not applicable

No public exploit

Varnish HTTP cache before 3.0.4: ACL bug

CVE-2019-15892

High

2019-09-03

Not applicable

No public exploit

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. The assert will cause an automatic restart with a clean cache, which makes it a Denial of Service attack.

CVE-2017-8807

Critical

2017-11-16

Not applicable

No public exploit

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 VFP_GetStorage buffer is larger than intended in certain circumstances involving -sfile Stevedore transient objects.

CVE-2017-12425

High

2017-08-04

Not applicable

No public exploit

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 requests from the client can trigger an assert, related to an Integer Overflow. This causes the varnishd worker process to abort and restart, losing the cached contents in the process. An attacker can therefore crash the varnishd worker process on demand and effectively keep it from serving content - a Denial-of-Service attack. The specific source-code filename containing the incorrect statement varies across releases.

CVE-2015-8852

High

2016-04-25

Not applicable

No public exploit

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 by a \r (carriage return) character in conjunction with multiple Content-Length headers in an HTTP request.

CVE-2013-0345

Low

2014-05-08

Not applicable

No public exploit

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. NOTE: some of these details are obtained from third party information.

CVE-2013-4484

Medium

2013-11-01

Not applicable

No public exploit

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.