Description
ATS negative cache option is vulnerable to a cache poisoning attack. If you have this option enabled, please upgrade or disable this feature. Apache Traffic Server versions 7.0.0 to 7.1.11 and 8.0.0 to 8.1.0 are affected.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | Apache Traffic Server | Apache Traffic Server 7.0.0 to 7.1.11, 8.0.0 to 8.1.0 | — |
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 12 | trafficserver | 8.1.1+ds-1 | — |
| Debian 10 | trafficserver | 8.0.2+ds-1+deb10u4 | DSA-4805-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | trafficserver | No fix yet | — |
| Ubuntu 16.04 LTS | trafficserver | No fix yet | — |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 20.04 LTS | trafficserver | No fix yet | — |
Advisories 1
- DSA-4805-1 trafficserver - security update Debian Security (DSA / DLA) · Mar 9, 2026