Bug 2477104 (CVE-2026-44293)

Summary:	CVE-2026-44293 protobufjs: protobufjs: Arbitrary code execution due to unsafe expression generation from crafted protobuf descriptors
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	abarbaro, abuckta, alizardo, amctagga, aoconnor, bbrownin, bniver, caswilli, cdrage, dkuc, dschmidt, erezende, flucifre, gmeno, groman, jchui, jhe, jkoehler, jlanda, jwong, kaycoth, kshier, ktsao, lchilton, lphiri, manissin, mbenjamin, mhackett, mstipich, nboldt, oaljalju, omaciel, orabin, psrna, rexwhite, rhel-process-autobot, rushinde, sfeifer, simaishi, smcdonal, sostapov, stcannon, sthirugn, teagle, ttakamiy, vereddy, watson-tool-maintainers, yguenane
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	---
Doc Text:	A flaw was found in protobufjs, a library used to compile protobuf definitions into JavaScript functions. A remote attacker could exploit this vulnerability by providing a crafted descriptor that includes a non-string default value for a bytes field. This could lead to the generation of an unsafe expression within the toObject conversion function, ultimately allowing the attacker to execute arbitrary code.	Story Points:	---
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Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2483197, 2483198, 2483199, 2483201, 2483202, 2483203
Bug Blocks:

Description OSIDB Bzimport 2026-05-13 16:04:13 UTC

protobufjs compiles protobuf definitions into JavaScript (JS) functions. Prior to 7.5.6 and 8.0.2, protobufjs generated JavaScript for toObject conversion could include an unsafe expression derived from a schema-controlled bytes field default value. A crafted descriptor with a non-string default value for a bytes field could cause attacker-controlled code to be emitted into the generated conversion function. This vulnerability is fixed in 7.5.6 and 8.0.2.

Comment 2 errata-xmlrpc 2026-07-01 11:03:16 UTC

This issue has been addressed in the following products:

  Red Hat Ansible Automation Platform 2.6 for RHEL 9

Via RHSA-2026:34160 https://access.redhat.com/errata/RHSA-2026:34160