Bug 2525215 (CVE-2026-81521)

Summary:	CVE-2026-81521 go.mongodb.org/mongo-driver: MongoDB Go Driver: Write redirection via unvalidated database name in Client.BulkWrite
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security DevOps Team <prodsec-dev>
Status:	NEW ---	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	aazores, abarbaro, agarcial, akhatavk, akostadi, akoudelk, alebedev, alizardo, amasferr, amctagga, anjoseph, anpicker, ansmith, aoconnor, aos-team-art-private, asdas, asegurap, bniver, bparees, cahl, cmah, derez, dfreiber, dhanak, dkeler, dmayorov, dpaolell, drosa, drow, dschmidt, dsimansk, dymurray, eaguilar, ebaron, eborisov, ebourniv, eglynn, flucifre, gbenhaim, gmeno, gparvin, groman, hasun, ibolton, jbritton, jburrell, jcantril, jchui, jdelft, jfula, jhe, jjoyce, jlanda, jlledo, jmatsuok, jmatthew, jmontleo, jowilson, jprabhak, jpretori, jsamir, jschluet, jtolenti, jupierce, kaycoth, kbempah, kingland, kshier, ktsao, lball, lbragsta, lchilton, lgamliel, lgarciaa, lhh, ljawale, mbenjamin, mbiarnes, mburns, mgarciac, mhackett, mnovotny, msilmser, mwringe, nboldt, ngough, niyer, nyancey, oaljalju, ometelka, pakotvan, pantinor, pgaikwad, pjindal, ppalepu, ppostler, prdhamdh, psrna, ptisnovs, rekumar, rhaigner, rhel-process-autobot, rjohnson, rojacob, sakbas, sausingh, sbratsla, sbunciak, sdawley, sfeifer, sghai, sidsharm, simaishi, slucidi, solenoci, sostapov, sseago, stcannon, sthirugn, suppawar, syedriko, teagle, thason, tsedmik, twaugh, vereddy, veshanka, vkumar, vlaad, vvoronko, watson-tool-maintainers, wenshen, whayutin, wtam, xdharmai, yguenane
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	---
Doc Text:	A flaw was found in the MongoDB Go Driver. The `Client.BulkWrite` operation does not properly validate database names, allowing a specially crafted name with reserved characters to redirect write operations. This vulnerability could enable an attacker to modify or corrupt data in unintended databases and collections.	Story Points:	---
Clone Of:		Environment:
Last Closed:		Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2026-08-27 20:17:14 UTC

The MongoDB Go Driver's client-level bulk write operation may accept a caller-supplied database name containing a reserved separator character without escaping it before the name is used to build the target namespace for the operation. An application that passes untrusted input as a database name could therefore have the write directed at a database and collection other than the ones it intended. Only the Client.BulkWrite API is affected.

Comment 1 Jon Orris 2026-09-16 17:22:35 UTC

This issue has been addressed in the following products:

  RHEM 1.1 for RHEL 10
  RHEM 1.1 for RHEL 9

Via RHSA-2026:68334 https://access.redhat.com/errata/RHSA-2026:68334