CVE-2026-73812
Publication date 1 September 2026
Last updated 28 September 2026
Ubuntu priority
Description
httpd function check_header/3 rejects duplicate Content-Length (per CVE-2026-23941) but never checks for the TE+CL co-presence that RFC 9112 §6.3 identifies as a probable smuggling attempt. handle_body/3 frames by chunked and silently discards Content-Length. A CL-preferring front-end paired with chunked-preferring inets creates a classic CL.TE front-end/back-end desync. This issue affects OTP from OTP 17.0 before OTP 27.3.4.17, from OTP 28.0 before OTP 28.5.0.6, and from OTP 29.0 before OTP 29.0.6, corresponding to inets from 5.10 before 9.3.2.7, from 9.4 before 9.6.2.3, and from 9.7 before 9.7.2. Whether OTP before OTP 17.0, corresponding to inets before 5.10, is affected is unknown.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| erlang | 26.04 LTS resolute |
Fixed 1:27.3.4.6+dfsg-1ubuntu0.1
|
| 24.04 LTS noble |
Fixed 1:25.3.2.8+dfsg-1ubuntu4.7
|
|
| 22.04 LTS jammy |
Fixed 1:24.2.1+dfsg-1ubuntu0.7
|
|
| 20.04 LTS focal |
Fixed 1:22.2.7+dfsg-1ubuntu0.5+esm2
|
|
| 18.04 LTS bionic |
Fixed 1:20.2.2+dfsg-1ubuntu2+esm3
|
|
| 16.04 LTS xenial |
Fixed 1:18.3-dfsg-1ubuntu3.1+esm3
|
|
| 14.04 LTS trusty |
Fixed 1:16.b.3-dfsg-1ubuntu2.2+esm2
|
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CVSS version: CVSS v4.0
Base score
8.3 · High
Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N
References
Related Ubuntu Security Notices (USN)
- USN-8827-1
- Erlang vulnerabilities
- 28 September 2026