CVE-2026-73276: Request Smuggling

Description

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.

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Weakness Type (CWE)

CWE-444 CWE-444

References

Other References

https://cna.erlef.org/cves/CVE-2026-73276.html https://github.com/erlang/otp/commit/60add5a19e2154560fdff3fe92dba14a68bbd683 https://github.com/erlang/otp/commit/6cd995e34d3bb3d36dd278dded2d62c25e71820c https://github.com/erlang/otp/commit/c285240c6e4b93960c5dc4f17ba04e6fdfb27a0f https://github.com/erlang/otp/security/advisories/GHSA-6v7q-jwgh-cx8p https://osv.dev/vulnerability/EEF-CVE-2026-73276

Frequently Asked Questions

What is CVE-2026-73276? +

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.

How do I check if I'm vulnerable to CVE-2026-73276? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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CVE-2026-73276