Description
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.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 13 | varnish | 7.1.1-1 | — |
| Debian 12 | varnish | 7.1.1-1 | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SUSE Package Hub 15 SP4 | varnish | 7.1.1-bp154.2.6.1 | openSUSE-SU-2022:10104-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | varnish | 7.1.1-1.1 | openSUSE-SU-2024:12255-1 |
| openSUSE Tumbleweed | vinyl-cache | 9.0.0-1.1 | openSUSE-SU-2026:10751-1 |
| openSUSE Leap 15.4 | varnish | 7.1.1-bp154.2.6.1 | openSUSE-SU-2022:10104-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | varnish | 7.0.3-r0 | — |
| Alpine v3.23 | varnish | 7.0.3-r0 | — |
| Alpine v3.22 | varnish | 7.0.3-r0 | — |
| Alpine v3.21 | varnish | 7.0.3-r0 | — |
| Alpine v3.20 | varnish | 7.0.3-r0 | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | varnish | 7.0.3-r0 | — |
| Alpine v3.18 | varnish | 7.0.3-r0 | — |
| Alpine v3.17 | varnish | 7.1.1-r0 | — |
Advisories 3
- openSUSE-SU-2026:10751-1 libvinylapi3-9.0.0-1.1 on GA media SUSE / openSUSE Security Updates · May 12, 2026
- openSUSE-SU-2022:10104-1 Security update for varnish SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:12255-1 libvarnishapi3-7.1.1-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
References
- https://varnish-cache.org/security/VSV00009.html
- FEDORA-2022-1fa6d1ed2f vendor-advisory
- FEDORA-2022-99702d9bdd vendor-advisory
- FEDORA-2022-99c5ddb2ae vendor-advisory