CVE-2026-88034: medium-severity vulnerability in MongoDB C++ Driver
GridFS data disclosure and deletion via query-operator injection in file IDs in the MongoDB C++ Driver
Published
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 6.1epss 0.5%
Improper neutralization of special elements in data query logic in the GridFS component of the MongoDB C++ Driver can cause a caller-supplied structured file identifier to be interpreted as a query condition rather than as a literal identifier. An authenticated user who can influence the identifier passed by an affected application may obtain stored file content beyond the intended target or cause all GridFS file chunks in the affected bucket to be removed, rendering stored file content unreadable.
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N
Affected products
MongoDB · C++ DriverRelated CVEs — MongoDB C++ Driver
In the same product, most dangerous first.
CVE-2026-81522HIGHCross-tenant database retargeting via dot/NUL injection in namespace strings in the C++ DriverEPSS 0.5%CVE-2026-106430MEDIUMQuery and rename target confusion via embedded NUL truncation in MongoDB C++ DriverEPSS 0.2%CVE-2026-84966MEDIUMBSON element injection via NUL-embedded document keys in builder appendEPSS 0.1%CVE-2026-84970MEDIUMHeap over-read or silent misparse via 32-bit truncation of JSON length in BSON JSON parserEPSS 0.1%
References
https://jira.mongodb.org/browse/CXX-3556