Bug 2495385

Summary:	CVE-2026-50193 python-avro: Jackson-databind: Denial of Service via deeply nested JSON processing [fedora-all]
Product:	[Fedora] Fedora	Reporter:	Jon Moroney <jmoroney>
Component:	python-avro	Assignee:	dev
Status:	NEW ---	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	rawhide	CC:	dev
Target Milestone:	---	Keywords:	Security, SecurityTracking
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:	{"flaws": ["7e41df78-c5f0-48cc-b978-29e7733e1541"]}
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Doc Text:		Story Points:	---
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	2491999

Description Jon Moroney 2026-06-30 21:52:00 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.

jackson-databind contains the general-purpose data-binding functionality and tree-model for Jackson Data Processor. From 2.13.0 until 2.14.0, a potential Denial-of-Service exists when attacker sends deeply nested JSON if (and only if) the service reads deeply nested (1000s of levels) JSON as JsonNode (ObjectMapper.readTree()) and writes out same (or modifided) node using JsonNode.toString(). This can consume significant amount of resources with concurrent relatively small requests (1000 nested arrays is 2kB). This vulnerability is fixed in 2.14.0.