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 Traffic Server: from 8.0.0 through 8.1.11, from 9.0.0 through 9.2.15, from 10.0.0 through 10.1.4, 10.2.0. Users are recommended to upgrade to version 9.2.16, 10.1.5, or 10.2.1, which fix the issue.
Fix
Nothing published yet: no patch, vendor advisory or mitigation reference on NVD, no vendor advisory in the News for this CVE, not in CISA's KEV, no fixed package version. BaselineWatch does not guess at one.
Change history 9
- StatusPublished → Awaiting AnalysisNVD modified 2026-10-28 14:10
- StatusAwaiting Analysis → PublishedNVD modified 2026-10-23 11:06
- StatusPublished → Awaiting AnalysisNVD modified 2026-10-23 12:18
- StatusAwaiting Analysis → PublishedNVD modified 2026-10-22 23:05
- StatusPublished → Awaiting AnalysisNVD modified 2026-10-22 16:56
- StatusReceived → PublishedNVD modified 2026-10-21 18:22
- StatusPublished → ReceivedNVD modified 2026-10-21 19:16
- CVSS9.1 (v4.0, CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:H/VA:L/SC:H/SI:H/SA:L) → 9.1 (v4.0, CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:H/VA:L/SC:H/SI:H/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X)NVD modified 2026-10-21 19:16
- First seenCVSS 9.1 · apache software foundationNVD modified 2026-10-21 18:22
Affected (CPE criteria) 0
NVD has not attached CPE configurations yet.