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CVE record · CVE-2026-66357

inets,httpd:HTTP Request Smuggling via obs-fold Header Continuation

CVSS 8.3 HighEPSS 0.0058 · 47th percentile

Published by the CVE Program (CNA: EEF) at 1 Sept 2026, 14:40 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
VendorProductVersions
Erlang OTP Package name: otp pkg:software-id/erlang.org/otp
  • unknown before 17.0 otp
  • affected 17.0 to before 27.3.4.17 otp
  • affected 28.0 to before 28.5.0.6 otp
  • affected 29.0 to before 29.0.6 otp
Other versions: unaffected
Erlang OTP Package name: inets pkg:otp/inets
  • unknown before 5.10 otp
  • affected 5.10 to before 9.3.2.7 otp
  • affected 9.4 to before 9.6.2.3 otp
  • affected 9.7 to before 9.7.2 otp
Other versions: unaffected
Erlang OTP Package name: erlang/otp https://github.com pkg:github/erlang/otp
  • affected 84adefa331c4159d432d22840663c38f155cd4c1 to before * git
Other versions: unaffected
Identifiers
CVE-2026-66357
CNA
EEF
Weakness (CWE)
CWE-444
Tags
Published
1 Sept 2026
Updated
8 Sept 2026

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

ScoreRatingCVSSVectorSource
8.3 High 4.0 CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:L/SA:N CNA (EEF)
  • CISA KEV Not listed.
  • EPSS 0.0058, the 47th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 1 Sept 2026. New records show when each source confirmed them.

Sources

References from the CNA

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.