CVE-2023-44487

CVE-2023-44487 – HTTP/2 Rapid Reset DoS Root cause: HTTP/2 stream resets can cause servers to continue processing, leading to unbounded resource consumption and potential DoS when clients rapidly cancel streams. What’s affected: Various HTTP/2 implementations and deployments, including servers, p...

CVE-2019-15892

CVE-2019-15892 affects Varnish Cache before 6.0.4 LTS and 6.1.x and before 6.2.1 in the 6.2.x line. An HTTP/1 parsing failure allows a remote attacker to trigger an assert, causing an automatic restart with a clean cache and resulting in a Denial of Service. The available fixes are to upgrade to ...

CVE-2017-8807

Varnish Cache CVE-2017-8807 affects 4.1.x before 4.1.9 and 5.x before 5.2.1. The flaw is in vbf_stp_error in bin/varnishd/cache/cache_fetch.c where a VFP_GetStorage buffer is larger than intended during -sfile Stevedore transient objects, allowing remote attackers to read memory from the process....

CVE-2022-23959

CVE-2022-23959 affects Varnish Cache and related variants, where HTTP/1 connections are vulnerable to a request smuggling flaw in versions before 6.6.2 (and 7.x before 7.0.2), 6.0 LTS before 6.0.10, and Varnish Enterprise/Cache Plus before 4.1.11r6 and 6.0.9r4. The root cause is improper handling...

CVE-2021-36740

Varnish Cache, with HTTP/2 enabled, is vulnerable to request smuggling and VCL authorization bypass via a large Content-Length header in POST requests. Affected: Varnish Enterprise 6.0.x before 6.0.8r3; 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. Mitigati...

CVE-2022-45060

CVE-2022-45060 – Varnish Cache HTTP/2 header forgery affects Varnish Cache 5.x and 6.x up to before 6.0.11, 7.x up to before 7.1.2, and 7.2.x up to before 7.2.1. An attacker can inject characters in HTTP/2 pseudo-headers that are invalid for HTTP/1 request lines, causing the Varnish server to gen...

CVE-2025-30346

Varnish Cache and Varnish Enterprise are affected by CVE-2025-30346: a HTTP/1 client-side desync vulnerability that can be triggered by malformed HTTP/1 requests. Affected versions are Varnish Cache prior to 7.6.2 and Varnish Enterprise prior to 6.0.13r10. The vulnerability description in connect...

CVE-2017-12425

Varnish HTTP Cache contains a denial-of-service vulnerability (CVE-2017-12425) due to a wrong if statement in varnishd that can cause an assertion when processing invalid client requests. This bug affects multiple releases: 4.0.1–4.0.4, 4.1.0–4.1.7, 5.0.0, and 5.1.0–5.1.2. Exploitation leads to t...

CVE-2022-38150

CVE-2022-38150 affects Varnish Cache 7.0.0–7.0.2 and 7.1.0. A crafted reason phrase in the backend response can cause the Varnish server to assert and automatically restart. The issue is mitigated by upgrading to Varnish 7.0.3 or 7.1.1, which include the fix. Several open-source advisories (openS...

CVE-2022-45059

CVE-2022-45059 (VSV00010) affects Varnish Cache 7.x before 7.1.2 and 7.2.x before 7.2.1. A request-smuggling vulnerability arises when certain headers are treated as hop-by-hop, preventing Varnish from forwarding critical headers (e.g., Content-Length, Host) to the backend. This can break HTTP/1 ...

CVE-2015-8852

Varnish 3.x before 3.0.7 is vulnerable to HTTP header injection/response smuggling due to a header line terminated by a CR in combination with multiple Content-Length headers. Exploitation could enable HTTP response splitting and related impacts. Remediation: upgrade to Varnish 3.0.7 or newer (as...

CVE-2013-4484

Varnish Cache (varnish) is affected by CVE-2013-4484. The vulnerability lies in handling of certain GET requests with trailing whitespace and no URI, which can trigger a remote denial of service via a child-process crash and a temporary caching outage. Public reports in the connected documents in...

CVE-2013-4090

CVE-2013-4090 concerns the Varnish HTTP cache before 3.0.4, due to an ACL bug in the access control logic. Affected component is the Varnish ACL handling in versions prior to 3.0.4. The practical impact is an integrity issue (I:H in CVSS v3.1) with potentially improper access control, as indicate...

CVE-2013-0345

CVE-2013-0345 affects Varnish 3.0.3, where world-readable permissions on /var/log/varnish/ and its log files allow local users to read sensitive information. The vulnerability is evidenced across multiple feeds (NVD entry and GLSA 2014-12-30, Fedora/OpenVAS entries) and is rated low by CVSS v2 (L...