Bug 2486949

Summary:	CVE-2026-44660 python-ujson: UltraJSON: Memory leak leading to Denial of Service [epel-all]
Product:	[Fedora] Fedora EPEL	Reporter:	Vipul Nair <vinair>
Component:	python-ujson	Assignee:	Ben Beasley <code>
Status:	CLOSED ERRATA	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	epel10	CC:	code, igor.raits, mail, python-packagers-sig
Target Milestone:	---	Keywords:	Security, SecurityTracking
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:	{"flaws": ["2b4eb773-34f6-4036-b574-884f991e683b"]}
Fixed In Version:	python-ujson-5.8.0-5.el9	Doc Type:	---
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2026-06-19 00:48:27 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	2482406

Description Vipul Nair 2026-06-09 09:58:30 UTC

Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

Comment 1 Ben Beasley 2026-06-09 10:17:20 UTC

From https://www.cve.org/CVERecord?id=CVE-2026-44660, this is fixed in upstream release 5.12.1, which has already reached stable in all active EPEL10 branches.

For EPEL9, python-ujson is at 5.8.0 due to breaking changes in 5.9.0, https://src.fedoraproject.org/rpms/python-ujson/pull-request/13. There are probably also some dependency issues involved in updating to the latest release, but it doesn’t matter, because I don’t think this CVE merits asking for an Updates Policy exception. However, the commit that fixed the problem, https://github.com/ultrajson/ultrajson/commit/82af1d0ac01d09aa40c887b460d44b9d9f4bccd9, is straightforward and self-contained enough that it can be backported to 5.8.0 for EPEL9.

Comment 2 Fedora Update System 2026-06-09 13:18:46 UTC

FEDORA-EPEL-2026-204e38b37f (python-ujson-5.8.0-5.el9) has been submitted as an update to Fedora EPEL 9.
https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-204e38b37f

Comment 3 Fedora Update System 2026-06-10 01:34:43 UTC

FEDORA-EPEL-2026-204e38b37f has been pushed to the Fedora EPEL 9 testing repository.

You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-204e38b37f

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 4 Fedora Update System 2026-06-19 00:48:27 UTC

FEDORA-EPEL-2026-204e38b37f (python-ujson-5.8.0-5.el9) has been pushed to the Fedora EPEL 9 stable repository.
If problem still persists, please make note of it in this bug report.