PatchTheCVECVE-2025-31699: Apache Traffic Server can return an origin connection to the shared pool while the origin is still waiting on
46
This month
HIGH 8.9REMOTEWATCHLIST
CVE-2025-31699 is a high-severity flaw (CVSS 8.9) affecting affected software. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
Apache Traffic Server can return an origin connection to the shared pool while the origin is still waiting on a request body the client declared but never fully sent, including when the client used Expect: 100-continue. The origin then reads a later request on that connection as leftover body data, which lets an attacker smuggle requests past ATS access controls, disrupt other users' requests, or poison the cache. This issue affects Apache Tra
Why this priority
- High severity
- Remotely exploitable, no login, no user action
- On your watchlist
A fixed release or distro patch exists.
Risk facts
| CVSS score | 8.9 (High) |
| Attack vector | Network (remote) |
| Attack complexity | High |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 0.3% (top 82%) |
| CISA exploited list | No |
| Weakness | CWE-444 |
| Published | 2026-10-21 |
| Last modified | 2026-10-23 |
Publisher (CNA): Apache Software Foundation
Timeline
- Published CVE record published
- Updated Record last modified
Exact fixes by distribution
Fedora 46 · kwin-zones · FIXED · 1.0.13-1.fc46 · FEDORA-2026-95888f332b · source
sudo dnf upgrade --advisory=FEDORA-2026-95888f332b
Fedora ELN · nginx-mod-brotli · FIXED · 1.0.0~rc-16.eln159 · FEDORA-2026-501a6a8273 · source
sudo dnf upgrade --advisory=FEDORA-2026-501a6a8273
Debian 12 · trafficserver · NO FIX YET
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Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.