CVE-2026-1849: mongodb inc mongodb server Uncontrolled Recursion
CVSS: 7.5v3.1HighAnalyzed
AliasesUBUNTU-CVE-2026-1849
Published 10-02-2026Last modified 10-02-2026
Vulnerability summary
CVE-2026-1849 is a high (CVSS 7.5) Uncontrolled Recursion vulnerability in mongodb inc mongodb server. EPSS estimates a 0.32% chance of exploitation in the next 30 days, higher than 23.5% of scored vulnerabilities.
CVSS score
7.5/10
010
High · v3.1 (NVD)EPSS score
0.32%
0%100%
Low · +0.04 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 10-02-2026PublishedVulnerability first disclosed.
- 10-02-2026Last modifiedVulnerability information updated.
Description
MongoDB Server may experience an out-of-memory failure while evaluating expressions that produce deeply nested documents. The issue arises in recursive functions because the server does not periodically check the depth of the expression.
CVSS metrics
6 scores · 3 sources · 2 versionsHigh 7.1Preferred score · CVE.org (CNA)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:NSourcesAll 3 agree
- OSV · UbuntuEcosystem advisory · calculated7.1HighCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
- NVDNIST7.1HighCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/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
High 7.5Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HSources3 sources · 6.5–7.5
- CVE.orgCNA6.5MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HDiffers
- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.32%
Chance of exploitation in the next 30 days
Percentile
24%
Versus all other CVEs
30-day change
+0.04 pp
From 0.28% on 21-09-2026
21-09-202621-10-2026
EPSS score0.32%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Mongodb1 product
- mongodb≥ 7.0.0, < 7.0.29 | ≥ 8.0.0, < 8.0.18 | ≥ 8.2.0, < 8.2.2
Mongodb inc1 product
- mongodb server≥ 8.0, < 8.0.18 | ≥ 7.0, < 7.0.29 | ≥ 8.2, < 8.2.2
Ubuntu1 product
- mongodbAll versions (No fix recorded)
3 vendors · 3 products