TI-2026-51405 Aliases CVE-2026-73276

inets, httpd: HTTP Request Smuggling via Whitespace-Before-Colon Header Dropping i

LOW 37CWE-444Published 2026-09-01 · Updated 2026-09-08

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Attack requirements: Present
Impact type: —
Confidentiality · integrity · availability: Low · High · None
Fix status: Partial Red Hat: 3 without a fix

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat.

Summary

Gracefulness code ignored cases that should be rejected, resulting in possible HTTP Request Smuggling opportunities. This issue affects OTP from OTP 22.2 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 7.1.2 before 9.3.2.7, from 9.4 before 9.6.2.3, and from 9.7 before 9.7.2.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00577 47th percentileScored 2026-11-07

Fix Partial OTP (Erlang): 27.3.4.17, 28.5.0.6, 29.0.6 +3Red Hat: 3 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Erlang	OTP	22.2 to before 27.3.4.17; 28.0 to before 28.5.0.6; 29.0 to before 29.0.6	27.3.4.17, 28.5.0.6, 29.0.6	Patch available	CNA
Erlang	OTP	7.1.2 to before 9.3.2.7; 9.4 to before 9.6.2.3; 9.7 to before 9.7.2	9.3.2.7, 9.6.2.3, 9.7.2	Patch available	CNA

OTP VendorErlang Affected 22.2 to before 27.3.4.17; 28.0 to before 28.5.0.6; 29.0 to before 29.0.6 Fixed in 27.3.4.17, 28.5.0.6, 29.0.6 Patch available CNA
OTP VendorErlang Affected 7.1.2 to before 9.3.2.7; 9.4 to before 9.6.2.3; 9.7 to before 9.7.2 Fixed in 9.3.2.7, 9.6.2.3, 9.7.2 Patch available CNA

CPE names CNA · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:erlang:erlang\/otp::::::::	—	—	Erlang

cpe:2.3:a:erlang:erlang\/otp:*:*:*:*:*:*:*:* Versions — — ·Erlang

Remediation

Fix · CNA OTP (Erlang) Fixed in 27.3.4.17, 28.5.0.6, 29.0.6
Fix · CNA OTP (Erlang) Fixed in 9.3.2.7, 9.6.2.3, 9.7.2

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

Release · 2026-09-01
Erlang OTP 27.3.4.17, 28.5.0.6, 29.0.6
4 records Highest priority Priority MEDIUM 1 MEDIUM, 3 LOW
Other records, highest priority first
- TI-2026-49185 httpd does not enforce the documented default max_clients connection limitPriority MEDIUM 45
- TI-2026-42572 uri_string does not bound the port component of a URI before integer conversionPriority LOW 38
- TI-2026-49189 eldap does not bound the port component of a referral URL before integer conversionPriority LOW 29
Show all 4 records →
Release · 2026-09-01
Erlang OTP 9.3.2.7, 9.6.2.3, 9.7.2
2 records Highest priority Priority MEDIUM 1 MEDIUM, 1 LOW
Other records, highest priority first
- TI-2026-49185 httpd does not enforce the documented default max_clients connection limitPriority MEDIUM 45
Show all 2 records →

Vendor assessments

Red Hat

Red Hat rating: Low. Red Hat's page for this CVE →

Product	Status	Plan or fix
Cryostat 4	Affected	No fix yet: Fix deferred
Red Hat Advanced Cluster Management for Kubernetes 2	Affected	No fix yet: Fix deferred
Red Hat OpenShift Dev Spaces	Affected	No fix yet: Fix deferred

Not affected: 1 product

Red Hat Hardened Images

Timeline

2026-10-02 Threatist record created from CVE-2026-73276

References

Patch 3

Advisory 1

https://github.com/erlang/otp/security/advisories/GHSA-6v7q-jwgh-cx8p

Other 2

TI-2025-23504 Erlang/OTP SSH Vulnerable to Pre-Authentication RCE KEVCVSS 3.1CRITICAL 10.0
TI-2026-48954 httpd parks a request worker indefinitely on a malformed chunk size sent after the headers CVSS 4.0HIGH 8.7
TI-2023-26623 The SSH transport protocol with certain OpenSSH extensions, found in OpenSSH before 9.6… CVSS 3.1MEDIUM 5.9
TI-2026-71037 Path traversal in rebar3 via unvalidated dependency app names CVSS 4.0HIGH 7.5
TI-2024-36042 ssl fails to validate incorrect extened key usage CVSS 3.1MEDIUM 5.5
TI-2020-10791 Rebar3 versions 3.0.0-beta.3 to 3.13.2 are vulnerable to OS command injection via URL… CVSS 3.1CRITICAL 9.8

See all 80 →

Sources

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