Not a U.S. government website. NDD is an independent vulnerability database by Volerion and is not affiliated with or endorsed by NIST or NVD.

CVE-2026-69201 Details

ANALYZED

This CVE record has been analyzed and enriched by NVDAPI.com as an independent party.

Description

Http4s is a Scala interface for HTTP services. Prior to 0.23.35 and 1.0.0-M47, ResourceService and WebjarService decode each URL path segment but reject only segments exactly equal to an empty string, a dot, or two dots. A request containing percent-encoded slash or backslash separators can turn an accepted segment into a parent-directory traversal after decoding, allowing access to classpath or WebJar resources outside the configured base when a directory-backed classpath is served and the backend preserves the encoded separator. The patch rejects decoded segments containing slash or backslash in ResourceService and WebjarService, and applies the same guard to the non-exploitable FileService for consistency. This issue is fixed in versions 0.23.35 and 1.0.0-M47.

Metrics

CVSS 3.x Severity and Vector Strings:

VolerionCVSS-B:3.7 LOWVector:CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

CNA: [email protected]CVSS-B:5.9 MEDIUMVector:CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.

URL	Source(s)	Tag(s)
https://github.com/http4s/http4s/commit/bcd99cdc1342ef58a0f132acb814af06a668a8d3	[email protected]	Source CodeVendor
https://github.com/http4s/http4s/releases/tag/v0.23.35	[email protected]	Release NotesVendor
https://github.com/http4s/http4s/releases/tag/v1.0.0-M47	[email protected]	Release NotesVendor
https://github.com/http4s/http4s/security/advisories/GHSA-crq5-92j2-j7wv	[email protected]	AdvisoryRemedyVendor

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-22	Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')	[email protected]

Affected Products

Product	Versions
http4s	<= 0.23.34 (semver) >= 1.0.0-M1, <= 1.0.0-M46 (semver)
CPE cpe:2.3:a:typelevel:http4s:::::::: Remediation Upgrade: 0.23.35moderate efforthttps://github.com/http4s/http4s/releases/tag/v0.23.35 Upgrade: 1.0.0-M47moderate efforthttps://github.com/http4s/http4s/releases/tag/v1.0.0-M47 Workaround:low effort Deploy as a fat jar, with no filesystem directories on the classpath. Mitigation:low effort Front the service with a proxy that rejects/normalizes %2F and %5C in the request path.
http4s-server	<= 0.23.34 (semver) >= 1.0.0-M1, <= 1.0.0-M46 (semver)
CPE No CPEs found in CPE dictionary for this product. Remediation Upgrade: 0.23.35moderate efforthttps://github.com/http4s/http4s/releases/tag/v0.23.35 Upgrade: 1.0.0-M47moderate efforthttps://github.com/http4s/http4s/releases/tag/v1.0.0-M47 Workaround:low effort Deploy as a fat jar, with no filesystem directories on the classpath. Mitigation:low effort Front the service with a proxy that rejects/normalizes %2F and %5C in the request path.

Change History

2 change records found show changes

Date	Action	Recorded By
Sep 15, 2026	CVE Modified	CISA-ADP
Sep 15, 2026	New CVE Received	[email protected]