CVE-2026-73812

CVSS 8.3 (high) · published 2026-09-01

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, OTP 28.5.0.6, and OTP 29.0.6, corresponding to inets from 5.10 before 9.3.2.7, 9.6.2.3, and 9.7.2. Whether OTP before OTP 17.0, corresponding to inets before 5.10, is affected is unknown.

Weakness: CWE-444

Source: NVD CVE-2026-73812

References

• https://cna.erlef.org/cves/CVE-2026-73812.html
• https://github.com/erlang/otp/commit/591dc00dc99dc2a426167a3b5257c0c94bd45e91
• https://github.com/erlang/otp/security/advisories/GHSA-7j6m-4ffg-hg46
• https://osv.dev/vulnerability/EEF-CVE-2026-73812
• https://www.erlang.org/doc/system/versions.html#order-of-versions

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