CVE-2026-4147: mongodb inc mongodb server Use of Uninitialized Variable
CVSS: 7.1v4.0HighAnalyzed
AliasesUBUNTU-CVE-2026-4147
Published 17-03-2026Last modified 17-03-2026
Vulnerability summary
CVE-2026-4147 is a high (CVSS 7.1) Use of Uninitialized Variable vulnerability in mongodb inc mongodb server. EPSS estimates a 0.38% chance of exploitation in the next 30 days, higher than 30.5% of scored vulnerabilities.
CVSS score
7.1/10
010
High · v4.0 (CVE.org)EPSS score
0.38%
0%100%
Low · +0.16 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 17-03-2026PublishedVulnerability first disclosed.
- 17-03-2026Last modifiedVulnerability information updated.
Description
An authenticated user with the read role may read limited amounts of uninitialized stack memory via specially-crafted issuances of the filemd5 command.
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:H/VI:N/VA:N/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:H/VI:N/VA:N/SC:N/SI:N/SA:N
- NVDNIST7.1HighCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/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
Medium 6.5Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:NSources3 sources · 4.3–6.5
- OSV · UbuntuEcosystem advisory · calculated4.3MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:NDiffers
- NVDNIST4.3MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:NDiffers
EPSS trend
Probability
0.38%
Chance of exploitation in the next 30 days
Percentile
31%
Versus all other CVEs
30-day change
+0.16 pp
From 0.21% on 21-09-2026
21-09-202621-10-2026
EPSS score0.38%
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, < 7.0.31 | ≥ 8.0.0, < 8.0.20 | ≥ 8.2.0, < 8.2.6 | 8.3.0:alpha0 | 8.3.0:alpha1 | 8.3.0:alpha2 | 8.3.0:alpha3 | 8.3.0:rc1
Mongodb inc1 product
- mongodb server≥ 8.2, < 8.2.6 | ≥ 8.0, < 8.0.20 | ≥ 7.0, < 7.0.31
Ubuntu1 product
- mongodbAll versions (No fix recorded)
3 vendors · 3 products