Description
Apache Traffic Server allows request smuggling if chunked messages are malformed.
This issue affects Apache Traffic Server: from 9.2.0 through 9.2.9, from 10.0.0 through 10.0.4.
Users are recommended to upgrade to version 9.2.10 or 10.0.5, which fixes the issue.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Apache Software Foundation | Apache Traffic Server | 9.2.0 – ≤ 9.2.9, 10.0.0 – ≤ 10.0.4 | — |
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 | 9.2.5+ds-0+deb12u3 | DSA-5948-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 25.10 | trafficserver | No fix yet | — |
| Ubuntu 24.04 LTS | trafficserver | No fix yet | — |
| Ubuntu 18.04 LTS | trafficserver | No fix yet | — |
| Ubuntu 16.04 LTS | trafficserver | No fix yet | — |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 22.04 LTS | trafficserver | No fix yet | — |
| Ubuntu Pro 20.04 LTS | trafficserver | No fix yet | — |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | trafficserver9 | 9.2.10-r0 | — |
| Alpine v3.23 | trafficserver9 | 9.2.10-r0 | — |
| Alpine v3.22 | trafficserver9 | 9.2.10-r0 | — |
| Alpine v3.21 | trafficserver9 | 9.2.10-r0 | — |
Advisories 2
- DSA-5948-1 trafficserver - security update Debian Security (DSA / DLA) · Mar 9, 2026
- WID-SEC-2025-0701 Apache Traffic Server: Schwachstelle ermöglicht Umgehen von Sicherheitsvorkehrungen BSI CERT-Bund (WID) · Jun 24, 2025
References
- https://lists.apache.org/thread/rwyx91rsrnmpjbm04footfjjf6m9d1c9 vendor-advisory