Varnish HTTP Cache

I’m new here, please explain this Varnish thing

What is happening

2024-02-06 - SLASH/ 1.0.0-rc1

Celebrating the 18th anniversary of Varnish-Cache and the first anniversary of the SLASH/ storage engines today, your Open-Source Varnish-Cache friends from UPLEX have just tagged the first version 1.0.0 candidate of our extension with storage engines (stevedores) and storage routers (loadmasters).

Over the past year, we have received a lot of helpful input from our users and have implemented substantial improvements. THANK YOU to everyone who has contributed by reporting issues, providing feedback and, just recently, adding documentation. SLASH/fellow has also helped improve Varnish-Cache itself.

After rigorous testing in particular over the past weeks, we now boldly claim that SLASH/ deserves a 1.0 version tag.

HAPPY BIRTHDAY Varnish-Cache!

HAPPY BIRTHDAY SLASH/buddy and SLASH/fellow!

Continue reading:

2023-11-13 - Varnish HTTP/2 Rapid Reset Attack

All Varnish Cache releases with HTTP/2 support suffer a vulnerability in the HTTP/2 protocol. Please see VSV00013 Varnish HTTP/2 Rapid Reset Attack for more information.

2023-11-13 - Security releases: 6.0.12, 7.3.1 and 7.4.2

Varnish versions 6.0.12, 7.3.1 and 7.4.2 are now available. These releases are published to address the vulnerability described in VSV00013.

2023-09-20 - Varnish 7.4.1 is released

Varnish 7.4.1 has been released and can be found here: Varnish Cache 7.4.1

This maintenance release fixes a bug preventing protected headers to be read from several subroutines.

2023-09-15 - Varnish 7.4.0 is released

Our bi-annual “fresh” release is here: Varnish Cache 7.4.0

The 7.2 series is no longer supported in any capacity.

2023-08-17 - VSV00012: Vulnerability in vmod_digest

Please see VSV00012 Base64 decoding vulnerability in vmod-digest

2023-03-15 - Varnish 7.3.0 is released

Our bi-annual “fresh” release is here: Varnish Cache 7.3.0

The 7.1 series is no longer supported in any capacity.

2023-02-06 - Two new Storage Engines for Varnish-Cache

Celebrating the 17th anniversary of Varnish-Cache today, your Open-Source Varnish-Cache friends from UPLEX have just released an extension with two new storage engines (stevedores) and two basic storage routers (loadmasters). One of the storage engines, fellow, offers persistent storage on disks (or SSDs, rather).

The preferred public repository with support for issues, merge-requests and other activities is at https://gitlab.com/uplex/varnish/slash

To read more:

2022-11-08 - Request Forgery Vulnerability

All supported versions of Varnish suffer from a request forgery vulnerability on HTTP/2 connections. Please see VSV00011 Varnish HTTP/2 Request Forgery Vulnerability for more information.

2022-11-08 - Request Smuggling Vulnerability

Varnish Cache releases 7.1 and 7.2 suffer from a Request Smuggling vulnerability. Please see VSV00010 Varnish Request Smuggling Vulnerability for more information.

2022-11-08 - Security releases: 6.0.11, 7.2.1 and 7.1.2

Varnish versions 6.0.11, 7.2.1 and 7.1.2 are now available. These releases are published to address the vulnerabilities described in VSV00010 and VSV00011.

2022-09-15 - Varnish 7.2.0 is released

Our bi-annual “fresh” release is here: Varnish Cache 7.2.0

The 7.0 series is no longer supported in any capacity.

2022-08-09 - Denial of Service Vulnerability

Varnish Cache releases 7.0 and 7.1 suffer from a Denial of Service vulnerability. Please see VSV00009 Varnish Denial of Service Vulnerability for more information.

2022-08-09 - Security releases: 7.1.1 and 7.0.3

Varnish versions 7.1.1 and 7.0.3 are now available. These releases fix the vulnerability described in VSV00009.

2022-03-15 - Varnish 7.1.0 is released

Our bi-annual “fresh” release is here: Varnish Cache 7.1.0

The 6.6 series is no longer supported in any capacity.

2022-01-25 - HTTP/1 Request Smuggling Vulnerability

All supported versions of Varnish suffer from a request smuggling vulnerability on HTTP/1 connections. Please see VSV00008 Varnish HTTP/1 Request Smuggling Vulnerability for more information.

2022-01-25 - Security releases: 6.0.10, 7.0.2 and 6.6.2

Varnish versions 6.0.10, 7.0.2 and 6.6.2 are now available. These releases fix the vulnerability described in VSV00008.

2021-11-24 - Varnish 6.0.9 is released

Varnish 6.0.9 has been released and can be found here: Varnish Cache 6.0.9

This maintenance release is recommended for all users of the 6.0 LTS and contains several bug fixes.

2021-11-23 - Varnish 7.0.1 is released

Varnish 7.0.1 has been released and can be found here: Varnish Cache 7.0.1

This is a maintenance release to correct some bugs that got into the 7.0.0 release.

2021-09-15 - Varnish 7.0.0 is released

Our bi-annual “fresh” release is here: Varnish Cache 7.0.0

The 6.5 series is no longer supported in any capacity.

(The 2022-03-15 release is likely to be 8.0.0)

2021-08-17 - Open Source parallel ESI for varnish-cache

On

we have released a Varnish Delivery Processor (VDP) for parallel ESI processing, which can deliver relevant speedups where portions of ESI-processed objects are not served from cache.

Read The pESI Announcement for more details.

2021-07-13 - HTTP/2 Request Smuggling Vulnerability

All supported versions of Varnish suffer from a request smuggling vulnerability when the HTTP/2 support is enabled. Please see VSV00007 Varnish HTTP/2 Request Smuggling Attack for more information.

2021-07-13 - Security releases: 6.0.8, 6.6.1 and 6.5.2

Varnish versions 6.0.8, 6.6.1 and 6.5.2 are now available. These releases fix the vulnerability described in VSV00007.

2021-07-13 - Varnish 6.0.8 is released

We are happy to announce the release of Varnish Cache 6.0.8.

This combined maintenance and security release is recommended for all users of the 6.0 LTS and contains several bug fixes, improvements and new features. More information is available in the Change log

2021-03-16 - Denial of Service in varnish-modules

Some versions of the separate varnish-modules bundle allow for a potential denial of service attack when the header.append() or header.copy() functions are used.

Please see VSV00006 varnish-modules Denial of Service.

2021-03-15 - Varnish 6.6.0 is released

Our bi-annual “fresh” release is here: Varnish Cache 6.6.0

(The 2021-09-15 release is likely to be 7.0.0)

2020-11-06 - Varnish 6.0.7 is released

We are happy to announce the release of Varnish Cache 6.0.7.

This maintenance release is recommended for all users of the 6.0 LTS and contains several bug fixes, improvements and new features. More information is available in the Change log

2020-09-25 - Varnish 6.5.1 is released

When preparing the 6.5.0 release, it was forgotten to bump the VRT_MAJOR_VERSION number defined in the vrt.h include file. This major version bump is needed due to the API and ABI changes as part of the release, to make sure that VMODs are not allowed used if they were compiled for the wrong Varnish version.

This has been fixed in the Varnish Cache 6.5.1 release.

2020-09-15 - Varnish 6.5.0 is released

Come and get it… Varnish Cache 6.5.0

2020-03-16 - Varnish 6.4.0 is released

Our bi-annual “fresh” release Varnish Cache 6.4.0

2020-02-04 - Security Advisory: Denial of Service

All supported versions of Varnish suffer from a denial of service attack when using the Proxy Protocol version 2. Please see VSV00005.

2020-02-04 - Security releases: 6.0.6, 6.2.3 and 6.3.2

Varnish versions 6.0.6, 6.2.3 and 6.3.2 are now available. See VSV00005 for details.

Older news

Package repository status

The official Linux (apt/yum) package repositories are now located at Packagecloud.io. A list of all available repositories can be found at: https://packagecloud.io/varnishcache

For more details on packages, see Releases & Downloads

Privacy

You can access the varnish-cache homepages with HTTP or HTTPS as you like.

We save the logfiles from our Varnish instance for a limited period, in order to be able to debug problems.

We do not use any external trackers and do not analyze traffic.