CVE-2026-13055: mongodb Reachable Assertion
CVSS: 7.1v4.0HighAnalyzed
AliasesUBUNTU-CVE-2026-13055
Published 22-07-2026Last modified 23-07-2026
Vulnerability summary
CVE-2026-13055 is a high (CVSS 7.1) Reachable Assertion vulnerability in mongodb. EPSS estimates a 0.40% chance of exploitation in the next 30 days, higher than 33% of scored vulnerabilities.
CVSS score
7.1/10
010
High · v4.0 (CVE.org)EPSS score
0.40%
0%100%
Low · +0.12 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 22-07-2026PublishedVulnerability first disclosed.
- 23-07-2026Last modifiedVulnerability information updated.
Description
The `$_internalIndexKey` aggregation expression can be used by any authenticated user to crash a MongoDB server (mongod). The expression fails to handle compound wildcard index specifications, triggering an internal consistency check that aborts the server process. The user must be able to run an aggregation pipeline.
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:N/AU:Y/R:ASourcesAll 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/AU:Y/R:A
- 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:Y/R:A/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:N/I:N/A:HSourcesAll 3 agree
- OSV · UbuntuEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- NVDNIST6.5MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.40%
Chance of exploitation in the next 30 days
Percentile
33%
Versus all other CVEs
30-day change
+0.12 pp
From 0.28% on 20-09-2026
20-09-202620-10-2026
EPSS score0.40%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Mongodb2 products
- mongodb≥ 7.0.0, < 7.0.39 | ≥ 8.0.0, < 8.0.28 | ≥ 8.2.0, < 8.2.12 | ≥ 8.3.0, < 8.3.7
- mongodb server≥ 7.0, < 7.0.39 | ≥ 8.0, < 8.0.28 | ≥ 8.2.0, < 8.2.12 | ≥ 8.3.0, < 8.3.7
Ubuntu1 product
- mongodbAll versions (No fix recorded)
2 vendors · 3 products