# CVE-2026-73276: inets, httpd: HTTP Request Smuggling via Whitespace-Before-Colon Header Dropping i

Status: published. Published: 2026-09-01. Updated: 2026-11-11.

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, OTP 28.5.0.6, and OTP 29.0.6, corresponding to inets from 7.1.2 before 9.3.2.7, 9.6.2.3, and 9.7.2.

## Remediation

- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: EEF) — https://github.com/erlang/otp/commit/60add5a19e2154560fdff3fe92dba14a68bbd683
- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: EEF) — https://github.com/erlang/otp/commit/6cd995e34d3bb3d36dd278dded2d62c25e71820c
- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: EEF) — https://github.com/erlang/otp/commit/c285240c6e4b93960c5dc4f17ba04e6fdfb27a0f

## Affected products and versions

- Erlang / OTP (otp): ≥ 22.2; < * (affected, otp); unaffected at 27.3.4.17; unaffected at 28.5.0.6; unaffected at 29.0.6. Source: CNA: EEF
- Erlang / OTP (inets): ≥ 7.1.2; < * (affected, otp); unaffected at 9.3.2.7; unaffected at 9.6.2.3; unaffected at 9.7.2. Source: CNA: EEF
- Erlang / OTP (erlang/otp): ≥ c06db0bedf49a9b40725745e73fa82e562612815; < * (affected, git); unaffected at 60add5a19e2154560fdff3fe92dba14a68bbd683; unaffected at 6cd995e34d3bb3d36dd278dded2d62c25e71820c; unaffected at c285240c6e4b93960c5dc4f17ba04e6fdfb27a0f. Source: CNA: EEF

## Severity and prioritization

- CVSS 4.0: 8.3 (high); 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; source: CNA: EEF

- CISA KEV: No listing in collected sources

- EPSS: 0.58% as of 2026-11-10; percentile 47.87%

- SSVC: exploitation none; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: CWE-444

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://github.com/erlang/otp/security/advisories/GHSA-6v7q-jwgh-cx8p (CNA: EEF; vendor-advisory)

- https://cna.erlef.org/cves/CVE-2026-73276.html (CNA: EEF; related)

- https://osv.dev/vulnerability/EEF-CVE-2026-73276 (CNA: EEF; related)

- https://www.erlang.org/doc/system/versions.html#order-of-versions (CNA: EEF; x_version-scheme)

- https://github.com/erlang/otp/commit/c06db0bedf49a9b40725745e73fa82e562612815 (CNA: EEF; related)

- https://github.com/erlang/otp/commit/60add5a19e2154560fdff3fe92dba14a68bbd683 (CNA: EEF; patch)

- https://github.com/erlang/otp/commit/6cd995e34d3bb3d36dd278dded2d62c25e71820c (CNA: EEF; patch)

- https://github.com/erlang/otp/commit/c285240c6e4b93960c5dc4f17ba04e6fdfb27a0f (CNA: EEF; patch)

## Provenance

- CNA: EEF: https://www.cve.org/CVERecord?id=CVE-2026-73276; retrieved 2026-11-11; source updated 2026-11-11

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-73276; retrieved 2026-11-11; source updated Not reported

Revision: 47b468897d4860f57caba59c7a91bcb58bac3c440cd26ddef493f94d55508bb8

Canonical: https://y2.dev/cve/CVE-2026-73276

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- Cyber API: https://api.y2.dev/api/v2/cyber/cves and https://api.y2.dev/api/v2/cyber/cves/{cveId}.

- Y2 Pro or Elite: create a workspace API key with the intel:cyber scope and send Authorization: Bearer <Y2_API_KEY>. Setup: https://y2.dev/docs/api/create-key.

- x402: Pay per request without an account or API key. Omit Authorization, read the HTTP 402 PAYMENT-REQUIRED challenge, validate its current requirements, and retry with PAYMENT-SIGNATURE through an authorized payment client. These browser tools never make payments. Guide: https://y2.dev/docs/api/x402.

- OpenAPI: https://y2.dev/api/openapi.yaml. Agent access metadata: https://y2.dev/cve/agent.json.

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