CVE-2026-73276 PUBLISHED

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

Assigner: EEF
Reserved: 12.08.2026 Published: 01.09.2026 Updated: 01.09.2026

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.

Metrics

CVSS 4.0

CVSS 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
CVSS Score: 8.3

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	Low	Confidentiality	None
Attack Complexity	Low	Integrity	High	Integrity	None
Attack Requirements	Present	Availability	None	Availability	None
Privileges Required	None
User Interaction	None

CVSS 4.0

Product Status

Vendor	Erlang
Product	OTP
Versions	Default: unaffected affected from 22.2 to 27.3.4.17 (excl.) affected from 28.0 to 28.5.0.6 (excl.) affected from 29.0 to 29.0.6 (excl.)

Vendor	Erlang
Product	OTP
Versions	Default: unaffected affected from 7.1.2 to 9.3.2.7 (excl.) affected from 9.4 to 9.6.2.3 (excl.) affected from 9.7 to 9.7.2 (excl.)

Vendor	Erlang
Product	OTP
Versions	Default: unaffected affected from c06db0bedf49a9b40725745e73fa82e562612815 to * (excl.)

Credits

Konrad Pietrzak / Ericsson remediation developer
Lukas Backström / Erlang Solutions reporter

References

Problem Types

CWE-444 Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') CWE

Impacts

CAPEC-33 HTTP Request Smuggling