CVE-2026-9749
- Source
- https://cve.org/CVERecord?id=CVE-2026-9749
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-9749.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-9749
- Aliases
- Downstream
- Published
- 2026-06-09T22:10:45.815Z
- Modified
- 2026-07-15T01:49:04.237674441Z
- Severity
-
- 7.1 (High) CVSS_V4 - 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 CVSS Calculator
- Summary
- Using MaxKey() may crash the server
- Details
-
This issue can occur when running an aggregation pipeline that uses the internal $exchange stage configured with key-range partitioning and order-preserving delivery. If a single key range produces enough documents to fill its exchange buffer (that is, many results are routed to the same consumer), the server reaches the code path where a full per-consumer buffer is detected but the internal "high watermark" for that key range is not updated as intended.
- Database specific
{ "cna_assigner": "mongodb", "cwe_ids": [ "CWE-617" ], "unresolved_ranges": [ { "source": "AFFECTED_FIELD", "extracted_events": [ { "introduced": "8.3.0" }, { "fixed": "8.3.3" }, { "introduced": "8.2.0" }, { "fixed": "8.2.10" }, { "introduced": "8.0.0" }, { "fixed": "8.0.24" }, { "introduced": "7.0.0" }, { "fixed": "7.0.35" } ] } ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/9xxx/CVE-2026-9749.json" }- References
Affected packages
Git / github.com/mongodb/mongo
Affected ranges
- Type
- GIT
- Repo
- https://github.com/mongodb/mongo
- Events
-
IntroducedFixedIntroducedFixedIntroducedFixedIntroducedFixed
- Database specific
{ "source": "CPE_RANGE", "cpe": "cpe:2.3:a:mongodb:mongodb:*:*:*:*:-:*:*:*", "extracted_events": [ { "introduced": "7.0.0" }, { "fixed": "7.0.35" }, { "introduced": "8.0.0" }, { "fixed": "8.0.24" }, { "introduced": "8.2.0" }, { "fixed": "8.2.10" }, { "introduced": "8.3.0" }, { "fixed": "8.3.3" } ] }
Affected versions
r7.*
r7.0.0
r7.0.1
r7.0.1-rc0
r7.0.10
r7.0.10-rc0
r7.0.11
r7.0.11-rc0
r7.0.11-rc1
r7.0.11-rc2
r7.0.12
r7.0.12-rc0
r7.0.12-rc1
r7.0.13
r7.0.13-rc0
r7.0.13-rc1
r7.0.14
r7.0.14-rc0
r7.0.15
r7.0.15-rc0
r7.0.15-rc1
r7.0.16
r7.0.16-rc0
r7.0.16-rc1
r7.0.17
r7.0.18
r7.0.2
r7.0.2-rc0
r7.0.2-rc1
r7.0.2-rc2
r7.0.21
r7.0.21-alpha0
r7.0.21-rc0
r7.0.22
r7.0.22-rc0
r7.0.23
r7.0.23-rc0
r7.0.23-rc1
r7.0.24
r7.0.24-rc0
r7.0.25-alpha0
r7.0.26
r7.0.26-rc0
r7.0.27
r7.0.27-alpha0
r7.0.27-rc0
r7.0.3
r7.0.3-rc0
r7.0.3-rc1
r7.0.4
r7.0.4-rc0
r7.0.5
r7.0.5-rc0
r7.0.6
r7.0.6-rc0
r7.0.7
r7.0.7-rc0
r7.0.7-rc1
r7.0.7-rc2
r7.0.8
r7.0.8-rc0
r7.0.9
r7.0.9-rc0
r7.0.9-rc1
r8.*
r8.0.0
r8.0.1
r8.0.1-rc0
r8.0.10
r8.0.10-rc0
r8.0.12
r8.0.12-rc0
r8.0.13
r8.0.13-rc0
r8.0.13-rc1
r8.0.13-rc2
r8.0.14
r8.0.14-rc0
r8.0.14-rc1
r8.0.16
r8.0.16-rc0
r8.0.16-rc1
r8.0.17-alpha0
r8.0.2
r8.0.3
r8.0.4
r8.0.4-rc0
r8.0.5
r8.0.5-rc0
r8.0.5-rc1
r8.0.5-rc2
r8.0.6
r8.2.0
r8.2.1
r8.2.1-rc0
r8.2.1-rc1
r8.2.2
r8.2.2-rc0
r8.2.3-alpha0
r8.2.4-alpha0
r8.2.4-alpha1
r8.3.0