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CVE-2026-61741 Details

ANALYZED

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

Description

http4s-scala-xml provides `EntityDecoder[F, scala.xml.Elem]` instances that parse XML message bodies. Prior to versions 0.24.1 and 1.0.0-M39, these decoders used a `javax.xml.parsers.SAXParserFactory` obtained from `SAXParserFactory.newInstance` without any security configuration. With the JDK's default settings, the parser resolves DOCTYPE declarations, external general and parameter entities, and external DTDs.An application that uses these decoders to parse untrusted XML is vulnerable to XML External Entity (XXE) attacks. An attacker can craft a request that discloses local files readable by the service process, performs server-side request forgery (SSRF) against internal network resources, and/or causes denial of service through entity expansion. Versions 0.24.1 and 1.0.0-M39 fix the issue.

Metrics

CVSS 3.x Severity and Vector Strings:

VolerionCVSS-B:9.1 CRITICALVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

CNA: [email protected]CVSS-B:9.3 CRITICALVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:L

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/http4s/http4s-scala-xml/security/advisories/GHSA-cjx3-73hr-rpw7	[email protected]	AdvisoryRemedyVendor

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-611	Improper Restriction of XML External Entity Reference	[email protected]

Affected Products

Product	Versions
http4s-scala-xml	<= 0.24.0 (semver) >= 1.0.0-M1, <= 1.0.0-M38.1 (semver)
CPE No CPEs found in CPE dictionary for this product. Remediation Upgrade: 0.24.1moderate effort Upgrade: 1.0.0-M39moderate effort Workaround:moderate effort Override `ElemInstances#saxFactory` with a hardened factory: ```scala val secured = new ElemInstances { override protected val saxFactory = { val f = javax.xml.parsers.SAXParserFactory.newInstance f.setFeature("http://apache.org/xml/features/disallow-doctype-decl", true) // etc. f } } import secured._ ```

Product

Versions

http4s-scala-xml

<= 0.24.0 (semver)

>= 1.0.0-M1, <= 1.0.0-M38.1 (semver)

CPE

No CPEs found in CPE dictionary for this product.

Remediation

Upgrade: 0.24.1moderate effort
Upgrade: 1.0.0-M39moderate effort
Workaround:moderate effort
Override `ElemInstances#saxFactory` with a hardened factory: ```scala val secured = new ElemInstances { override protected val saxFactory = { val f = javax.xml.parsers.SAXParserFactory.newInstance f.setFeature("http://apache.org/xml/features/disallow-doctype-decl", true) // etc. f } } import secured._ ```

Change History

2 change records found show changes

Date	Action	Recorded By
Sep 29, 2026	CVE Modified	CISA-ADP
Sep 24, 2026	New CVE Received	[email protected]