CVE-2026-11933 json
Post-authentication use-after-free in server-side JavaScript BSON-to-array conversion
published 2026-06-12 4 mo ago modified 2026-09-08 2 mo ago also BIT-mongodb-2026-11933 , EUVD-2026-36373
- cvss
- 8.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 32%
- public exploits
- 0
- none known
Summary
A use-after-free vulnerability exists in MongoDB Server's server-side JavaScript engine when converting BSON documents to JavaScript arrays. An authenticated user with read privileges who is able to run server-side JavaScript (for example, via $where or $function) can cause the server to access memory that has already been freed. This may result in disclosure of information from the mongod process memory or a denial of service through a server crash.
Patch / fix
- bitnami mongodb 4.4.31, 5.0.34, 6.0.29, 7.0.37, 8.0.26, 8.2.11, 8.3.4
- mongodb mongodb 4.4.31, 5.0.34, 6.0.29, 7.0.37, 8.0.26, 8.2.11, 8.3.4
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 4 mo ago
Exploit prediction
0.38% chance of exploitation in the next 30 days, higher than 32% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| CNA | 4.0 | 8.7 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N |
| CNA | 4.0 | 8.7 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
| NVD | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| bitnami | mongodb | >=4.4.0, <4.4.31 >=5.0.0, <5.0.34 >=6.0.0, <6.0.29 >=7.0.0, <7.0.37 >=8.0.0, <8.0.26 >=8.2.0, <8.2.11 >=8.3.0, <8.3.4 |
4.4.31 5.0.34 6.0.29 7.0.37 8.0.26 8.2.11 8.3.4 |
Affected products
- MongoDB MongoDB
Classification
- Weakness
- Technology feeds
References
-
jira.mongodb.org
/browse/SERVER-128125
patch, vendor-advisory, advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-11933
web
Sources
- CVE List CVE-2026-11933
- NVD CVE-2026-11933
- OSV BIT-mongodb-2026-11933
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.