MongoDB Atlas SQL ODBC Driver writes 48-byte Extended JSON into fixed 16-byte SQL_C_GUID target, causing a 32-byte out-of-bounds write
Written by anthropic/claude-haiku-5.5 from the sources below. Verify against them.
- Exploited
- No known exploitation
- Fix
- Fixed in 3.0.1
- Who is exposed
- Not reported
Do first: Upgrade to a fixed version: 3.0.1.
- Exploitation?/40Exploitation: unknown (data gap). No CISA SSVC exploitation rating yet
- Exposure3/25Reachable over the network · Data gap: No advisory context yet
- Reach?/20Reach: unknown (data gap). No tracked technology or package matched
- Severity6/10CVSS 6.0
- No patch0/5No signal
What would change the score
- Would score about 64 if added to CISA KEV
- Would score about 59 if CISA's SSVC rates exploitation active
- Would score about 28 if advisories confirm default setups are exposed
CVE-2026-120952 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 6.0 (medium) and affects Atlas SQL ODBC Driver; fixed in 3.0.1.
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- Published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- A 0-100 score for how much a CVE matters across the industry: exploitation, exposure, how widely the software is used, severity and whether a fix exists.What do these mean? →
- 9/100 · provisional
- Fix
- Fixed in 3.0.1
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
The MongoDB Atlas SQL ODBC Driver, used by applications that query MongoDB Atlas through ODBC, is affected. A database user with basic write access could trigger a memory overflow when data is retrieved, which may corrupt the memory of the application using the driver and cause it to crash.
Read the original description
An out-of-bounds write in the MongoDB Atlas SQL ODBC Driver may be triggered when a value of a particular database type is retrieved into a fixed-width client-side target. The driver produces a textual form of the value that is longer than the fixed target the ODBC interface defines, and copies it without limiting the copy to the target's real size. A database user with basic write privileges can influence part of the data written outside the target, which may corrupt memory in the application using the driver and cause that application to terminate unexpectedly.
What to do
Upgrade to a fixed version: 3.0.1.
Timeline
- CVE published
- First seen by cve.now
Affected versions
- MongoDB Atlas SQL ODBC Driver
From 0.0.1 · fixed in 3.0.1
Evidence 2
- Link
- Link
Corrections
None so far.
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Questions about CVE-2026-120952
Is CVE-2026-120952 being exploited?
It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.Source: cve.now feed data
Which versions are affected by CVE-2026-120952?
Atlas SQL ODBC Driver: from 0.0.1 before 3.0.1.Source: cve.now feed data
How do I fix CVE-2026-120952?
Upgrade to a fixed version: 3.0.1.Source: cve.now feed data