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CVE-2026-73812

CVE-2026-73812 · inets, httpd: HTTP Request Smuggling via Transfer-Encoding and Content-Length

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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.

CVSS 8.3 · High · EPSS 0.5% · Fix available

Published
Updated

Stack: system

Affected products and versions

  • otp

    Versions
    • ≥ 0, < 17.0: Unknown (otp)
    • ≥ 17.0, < 27.3.4.17: Affected (otp)
    • ≥ 28.0, < 28.5.0.6: Affected (otp)
    • ≥ 29.0, < 29.0.6: Affected (otp)

    Update to 27.3.4.17; Update to 28.5.0.6; Update to 29.0.6

  • otp

    Versions
    • ≥ 0, < 5.10: Unknown (otp)
    • ≥ 5.10, < 9.3.2.7: Affected (otp)
    • ≥ 9.4, < 9.6.2.3: Affected (otp)
    • ≥ 9.7, < 9.7.2: Affected (otp)

    Update to 9.3.2.7; Update to 9.6.2.3; Update to 9.7.2

  • otp

    Versions
    • ≥ 84adefa331c4159d432d22840663c38f155cd4c1, < 591dc00dc99dc2a426167a3b5257c0c94bd45e91: Affected (git)

    Update to 591dc00dc99dc2a426167a3b5257c0c94bd45e91

  • erlang Debian:12

    Versions
    • 1:25.2.3+dfsg-1
    • 1:25.2.3+dfsg-1+deb12u1
    • 1:25.2.3+dfsg-1+deb12u2
    • 1:25.2.3+dfsg-1+deb12u3
    • 1:25.2.3+dfsg-1+deb12u4
    • 1:25.3.2.10+dfsg-1
    • 1:25.3.2.10+dfsg-2
    • 1:25.3.2.11+dfsg-1
    • 1:25.3.2.12+dfsg-1
    • 1:25.3.2.12+dfsg-2
    • 1:25.3.2.12+dfsg-3
    • 1:25.3.2.8+dfsg-1
    • 1:26.0+dfsg-1
    • 1:26.0.1+dfsg-1
    • 1:26.0.2+dfsg-1
    • 1:26.0~rc2+dfsg-1
    • 1:26.0~rc3+dfsg-1
    • 1:26.1.2+dfsg-1
    • 1:26.2.1+dfsg-1
    • 1:26.2.4+dfsg-1
    • 1:27.0+dfsg-1
    • 1:27.0.1+dfsg-1
    • 1:27.0.1+dfsg-2
    • 1:27.0.1+dfsg-3
    • 1:27.0~rc3+dfsg-1
    • 1:27.0~rc3+dfsg-2
    • 1:27.0~rc3+dfsg-3
    • 1:27.0~rc3+dfsg-4
    • 1:27.1.2+dfsg-1
    • 1:27.2+dfsg-1
    • 1:27.2+dfsg-2
    • 1:27.2+dfsg-3~exp1
    • 1:27.2.1+dfsg-1
    • 1:27.2.1+dfsg-2
    • 1:27.2.2+dfsg-1
    • 1:27.2.3+dfsg-1
    • 1:27.2.4+dfsg-1
    • 1:27.3+dfsg-1
    • 1:27.3.1+dfsg-1
    • 1:27.3.2+dfsg-1
    • 1:27.3.3+dfsg-1
    • 1:27.3.4+dfsg-1
    • 1:27.3.4.1+dfsg-1
    • 1:27.3.4.10+dfsg-1
    • 1:27.3.4.11+dfsg-1
    • 1:27.3.4.11+dfsg-2
    • 1:27.3.4.11+dfsg-3
    • 1:27.3.4.11+dfsg-4
    • 1:27.3.4.11+dfsg-5
    • 1:27.3.4.11+dfsg-6
    • 1:27.3.4.11+dfsg-7
    • 1:27.3.4.12+dfsg-1
    • 1:27.3.4.3+dfsg-1
    • 1:27.3.4.4+dfsg-1
    • 1:27.3.4.6+dfsg-1
    • 1:27.3.4.8+dfsg-1
    • 1:27.3.4.9+dfsg-1
    • 1:28.0+dfsg-1
    • 1:28.0.1+dfsg-1
    • 1:28.0.2+dfsg-1
    • 1:28.0.4+dfsg-1
    • 1:28.1.1+dfsg-1
    • 1:28.2+dfsg-1
    • 1:28.3+dfsg-1
    • 1:28.3.1+dfsg-1
    • 1:29.0+dfsg-1
    • 1:29.0+dfsg-2
    • 1:29.0.1+dfsg-1
    • 1:29.0.2+dfsg-1
    • 1:29.0.3+dfsg-1
    • 1:29.0.4+dfsg-1
    • 1:29.0.6+dfsg-1
    • 1:29.0~rc1+dfsg-1
    • 1:29.0~rc1+dfsg-2
    • 1:29.0~rc2+dfsg-1
    • 1:29.0~rc3+dfsg-1
    • 1:29.0~rc3+dfsg-2
    • 1:29.0~rc3+dfsg-3
    • 1:29.0~rc3+dfsg-4
    • 1:29.1.1+dfsg-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • erlang Debian:13

    Versions
    • 1:27.3.4.1+dfsg-1
    • 1:27.3.4.1+dfsg-1+deb13u1
    • 1:27.3.4.1+dfsg-1+deb13u2
    • 1:27.3.4.1+dfsg-1+deb13u3
    Affected ranges
    • ECOSYSTEM: < 1:27.3.4.1+dfsg-1+deb13u4

    Update to 1:27.3.4.1+dfsg-1+deb13u4

  • erlang Debian:14

    Versions
    • 1:27.3.4.1+dfsg-1
    • 1:27.3.4.10+dfsg-1
    • 1:27.3.4.11+dfsg-1
    • 1:27.3.4.11+dfsg-2
    • 1:27.3.4.11+dfsg-3
    • 1:27.3.4.11+dfsg-4
    • 1:27.3.4.11+dfsg-5
    • 1:27.3.4.11+dfsg-6
    • 1:27.3.4.11+dfsg-7
    • 1:27.3.4.12+dfsg-1
    • 1:27.3.4.3+dfsg-1
    • 1:27.3.4.4+dfsg-1
    • 1:27.3.4.6+dfsg-1
    • 1:27.3.4.8+dfsg-1
    • 1:27.3.4.9+dfsg-1
    • 1:28.0+dfsg-1
    • 1:28.0.1+dfsg-1
    • 1:28.0.2+dfsg-1
    • 1:28.0.4+dfsg-1
    • 1:28.1.1+dfsg-1
    • 1:28.2+dfsg-1
    • 1:28.3+dfsg-1
    • 1:28.3.1+dfsg-1
    • 1:29.0+dfsg-1
    • 1:29.0+dfsg-2
    • 1:29.0.1+dfsg-1
    • 1:29.0.2+dfsg-1
    • 1:29.0.3+dfsg-1
    • 1:29.0.4+dfsg-1
    • 1:29.0~rc1+dfsg-1
    • 1:29.0~rc1+dfsg-2
    • 1:29.0~rc2+dfsg-1
    • 1:29.0~rc3+dfsg-1
    • 1:29.0~rc3+dfsg-2
    • 1:29.0~rc3+dfsg-3
    • 1:29.0~rc3+dfsg-4
    Affected ranges
    • ECOSYSTEM: < 1:29.0.6+dfsg-1

    Update to 1:29.0.6+dfsg-1

  • erlang Ubuntu:Pro:14.04:LTS

    Versions
    • 1:16.b.1-dfsg-4ubuntu1
    • 1:16.b.2-dfsg-1ubuntu1
    • 1:16.b.2-dfsg-2ubuntu1
    • 1:16.b.3-dfsg-1ubuntu1
    • 1:16.b.3-dfsg-1ubuntu2
    • 1:16.b.3-dfsg-1ubuntu2.1
    • 1:16.b.3-dfsg-1ubuntu2.2
    • 1:16.b.3-dfsg-1ubuntu2.2+esm1
    Affected ranges
    • ECOSYSTEM: < 1:16.b.3-dfsg-1ubuntu2.2+esm2

    Update to 1:16.b.3-dfsg-1ubuntu2.2+esm2

  • erlang Ubuntu:Pro:16.04:LTS

    Versions
    • 1:18.0-dfsg-1ubuntu1
    • 1:18.0-dfsg-1ubuntu2
    • 1:18.2-dfsg-2ubuntu1
    • 1:18.3-dfsg-1ubuntu1
    • 1:18.3-dfsg-1ubuntu2
    • 1:18.3-dfsg-1ubuntu3
    • 1:18.3-dfsg-1ubuntu3.1
    • 1:18.3-dfsg-1ubuntu3.1+esm1
    • 1:18.3-dfsg-1ubuntu3.1+esm2
    Affected ranges
    • ECOSYSTEM: < 1:18.3-dfsg-1ubuntu3.1+esm3

    Update to 1:18.3-dfsg-1ubuntu3.1+esm3

  • erlang Ubuntu:Pro:18.04:LTS

    Versions
    • 1:20.0.4+dfsg-1ubuntu1
    • 1:20.1.2+dfsg-1ubuntu1
    • 1:20.1.3+dfsg-1ubuntu1
    • 1:20.1.4+dfsg-1ubuntu1
    • 1:20.1.5+dfsg-1ubuntu1
    • 1:20.1.6+dfsg-1ubuntu1
    • 1:20.1.7+dfsg-1ubuntu1
    • 1:20.2.1+dfsg-1ubuntu1
    • 1:20.2.2+dfsg-1ubuntu1
    • 1:20.2.2+dfsg-1ubuntu2
    • 1:20.2.2+dfsg-1ubuntu2+esm1
    • 1:20.2.2+dfsg-1ubuntu2+esm2
    Affected ranges
    • ECOSYSTEM: < 1:20.2.2+dfsg-1ubuntu2+esm3

    Update to 1:20.2.2+dfsg-1ubuntu2+esm3

  • erlang Ubuntu:Pro:20.04:LTS

    Versions
    • 1:22.0.7+dfsg-1build1
    • 1:22.2+dfsg-1
    • 1:22.2.1+dfsg-1
    • 1:22.2.2+dfsg-1
    • 1:22.2.3+dfsg-1
    • 1:22.2.3+dfsg-2
    • 1:22.2.4+dfsg-1
    • 1:22.2.7+dfsg-1
    • 1:22.2.7+dfsg-1ubuntu0.2
    • 1:22.2.7+dfsg-1ubuntu0.3
    • 1:22.2.7+dfsg-1ubuntu0.4
    • 1:22.2.7+dfsg-1ubuntu0.5
    • 1:22.2.7+dfsg-1ubuntu0.5+esm1
    Affected ranges
    • ECOSYSTEM: < 1:22.2.7+dfsg-1ubuntu0.5+esm2

    Update to 1:22.2.7+dfsg-1ubuntu0.5+esm2

  • erlang Ubuntu:22.04:LTS

    Versions
    • 1:23.2.6+dfsg-1build1
    • 1:24.1.1+dfsg-1
    • 1:24.1.4+dfsg-1
    • 1:24.1.5+dfsg-1
    • 1:24.1.5+dfsg-1ubuntu1
    • 1:24.2+dfsg-1
    • 1:24.2.1+dfsg-1
    • 1:24.2.1+dfsg-1ubuntu0.1
    • 1:24.2.1+dfsg-1ubuntu0.2
    • 1:24.2.1+dfsg-1ubuntu0.3
    • 1:24.2.1+dfsg-1ubuntu0.4
    • 1:24.2.1+dfsg-1ubuntu0.5
    • 1:24.2.1+dfsg-1ubuntu0.6
    Affected ranges
    • ECOSYSTEM: < 1:24.2.1+dfsg-1ubuntu0.7

    Update to 1:24.2.1+dfsg-1ubuntu0.7

  • erlang Ubuntu:24.04:LTS

    Versions
    • 1:25.2.3+dfsg-1
    • 1:25.3.2.8+dfsg-1
    • 1:25.3.2.8+dfsg-1ubuntu1
    • 1:25.3.2.8+dfsg-1ubuntu3
    • 1:25.3.2.8+dfsg-1ubuntu4
    • 1:25.3.2.8+dfsg-1ubuntu4.1
    • 1:25.3.2.8+dfsg-1ubuntu4.2
    • 1:25.3.2.8+dfsg-1ubuntu4.3
    • 1:25.3.2.8+dfsg-1ubuntu4.4
    • 1:25.3.2.8+dfsg-1ubuntu4.5
    • 1:25.3.2.8+dfsg-1ubuntu4.6
    Affected ranges
    • ECOSYSTEM: < 1:25.3.2.8+dfsg-1ubuntu4.7

    Update to 1:25.3.2.8+dfsg-1ubuntu4.7

  • erlang Ubuntu:26.04:LTS

    Versions
    • 1:27.3.4.1+dfsg-1build1
    • 1:27.3.4.3+dfsg-1
    • 1:27.3.4.4+dfsg-1
    • 1:27.3.4.6+dfsg-1
    Affected ranges
    • ECOSYSTEM: < 1:27.3.4.6+dfsg-1ubuntu0.1

    Update to 1:27.3.4.6+dfsg-1ubuntu0.1

Original sources

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