CVE-2026-69204
- Source
- https://cve.org/CVERecord?id=CVE-2026-69204
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-69204.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-69204
- Aliases
- Published
- 2026-09-15T18:43:14Z
- Modified
- 2026-09-17T03:47:19Z
- Severity
-
- 9.2 (Critical) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N CVSS Calculator
- Summary
- Http4s: Ember accepts Transfer-Encoding combined with Content-Length (CL.TE request smuggling)
- Details
-
Http4s is a Scala interface for HTTP services. Prior to 0.23.35 and 1.0.0-M47, Ember HTTP/1.1 does not reject messages containing both Transfer-Encoding and Content-Length, so an intermediary and Ember can select different body framing rules. When ember-server is behind a keep-alive intermediary that forwards both headers and frames by Content-Length, an unauthenticated attacker can smuggle a second request, bypass intermediary access controls, poison caches, or cause a victim request to be joined to an attacker-controlled prefix. The shared response parser can also desynchronize an ember-client connection when a malicious or compromised upstream sends both headers. This issue is fixed in versions 0.23.35 and 1.0.0-M47.
- Database specific
{ "cna_assigner": "GitHub_M", "cwe_ids": [ "CWE-444" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/69xxx/CVE-2026-69204.json" }- References
-
- https://github.com/http4s/http4s/releases/tag/v0.23.35
- https://github.com/http4s/http4s/releases/tag/v1.0.0-M47
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/69xxx/CVE-2026-69204.json
- https://github.com/http4s/http4s/security/advisories/GHSA-8h4c-x2wg-6xp8
- https://nvd.nist.gov/vuln/detail/CVE-2026-69204
- https://github.com/http4s/http4s/commit/9feaf8677951a52af906ae9664ff6f0543d9d810
Affected packages
Git / github.com/http4s/http4s
Affected ranges
- Type
- GIT
- Repo
- https://github.com/http4s/http4s
- Events
-
Introduced0 Unknown introduced commit / All previous commits are affectedIntroducedFixedFixedFixed
- Database specific
-
Show details
{ "extracted_events": [ { "introduced": "0" }, { "fixed": "0.23.35" }, { "introduced": "1.0.0-M1" }, { "fixed": "1.0.0-M47" } ], "source": [ "AFFECTED_FIELD", "REFERENCES" ] }
Affected versions
v0.*
v0.23.0
v0.23.0-M1
v0.23.1
v0.23.10
v0.23.11
v0.23.12
v0.23.13
v0.23.14
v0.23.15
v0.23.16
v0.23.18
v0.23.19
v0.23.19-RC1
v0.23.19-RC2
v0.23.2
v0.23.20
v0.23.22
v0.23.23
v0.23.24
v0.23.25
v0.23.26
v0.23.27
v0.23.28
v0.23.29
v0.23.3
v0.23.30
v0.23.31
v0.23.32
v0.23.33
v0.23.34
v0.23.5
v0.23.6
v0.23.7
v0.23.8
v0.23.9
v1.*
v1.0.0-M1
v1.0.0-M10
v1.0.0-M11
v1.0.0-M12
v1.0.0-M13
v1.0.0-M15
v1.0.0-M16
v1.0.0-M17
v1.0.0-M19
v1.0.0-M2
v1.0.0-M20
v1.0.0-M21
v1.0.0-M22
v1.0.0-M24
v1.0.0-M26
v1.0.0-M28
v1.0.0-M29
v1.0.0-M3
v1.0.0-M30
v1.0.0-M31
v1.0.0-M32
v1.0.0-M33
v1.0.0-M34
v1.0.0-M35
v1.0.0-M36
v1.0.0-M37
v1.0.0-M39
v1.0.0-M4
v1.0.0-M40
v1.0.0-M41
v1.0.0-M42
v1.0.0-M43
v1.0.0-M44
v1.0.0-M45
v1.0.0-M46
v1.0.0-M5
v1.0.0-M6
v1.0.0-M7
v1.0.0-M8
v1.0.0-M9