CVE-2026-61741 http4s-scala-xml - XML External Entity Injection

http4s-scala-xml < 0.24.1 and < 1.0.0-M39 contains an XML External Entity (XXE) injection caused by insecure SAXParserFactory configuration in EntityDecoder, letting attackers disclose local files, perform SSRF, or cause DoS, exploit requires parsing untrusted XML.

CVSS base score 9.3 /10
Critical
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.29% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
XML External Entity Injection
Impact
Information Disclosure, Server Side Request Forgery, Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:L
Published
24 September 2026
Updated
15 October 2026
Weakness
CWE-611

Vendor fix

Upgrade to versions 0.24.1 or 1.0.0-M39 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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