CVE-2026-96749

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Source
https://cve.org/CVERecord?id=CVE-2026-96749
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-96749.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-96749
Aliases
  • GHSA-v4x9-3549-crwv
Downstream
Published
2026-09-24T18:18:13Z
Modified
2026-09-26T08:07:53Z
Severity
  • 7.5 (High) CVSS_V4 - CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N CVSS Calculator
Summary
Heap out-of-bounds write via signed size overflow in BSON document encoding
Details

An integer overflow in the BSON document encoding component of the MongoDB Python Driver's bundled native extension may occur when a single document is built from an unusually large amount of caller-supplied data. Size arithmetic is performed in a signed 32-bit type, and the guard meant to catch the overflow is written in a form whose behavior is not defined by the C language standard. A party with no privileges who can place a very large value into data that an application encodes may, depending on how the native extension was built, cause a write outside the bounds of an allocated buffer inside the application's own process.

Database specific 
{
    "cna_assigner":  "mongodb",
    "cwe_ids":  [
        "CWE-190"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/96xxx/CVE-2026-96749.json",
    "unresolved_ranges":  [
        {
            "extracted_events":  [
                {
                    "introduced":  "1.9.0"
                },
                {
                    "fixed":  "4.18.2"
                }
            ],
            "source":  "AFFECTED_FIELD"
        }
    ]
}
References

Affected packages

Git / github.com/mongodb/mongo-python-driver

Affected ranges

Type
GIT
Repo
https://github.com/mongodb/mongo-python-driver
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
640dd2383a1a2fb1a10e5222d50ebc0b22a61bd7
Database specific
Show details 
{
    "source":  "REFERENCES"
}

Affected versions

0.*
0.10
0.10.1
0.10.2
0.10.3
0.11
0.11.1
0.11.2
0.11.3
0.12
0.13
0.14
0.14.1
0.14.2
0.15
0.15.1
0.15.2
0.16
0.4pre
0.5.1pre
0.5.2pre
0.5.3pre
0.5pre
0.6
0.7
0.7.1
0.7.2
0.8
0.8.1
0.9
0.9.1
0.9.2
0.9.3
0.9.4
0.9.5
1.*
1.0
1.1
1.1.1
1.1.2
1.10
1.10.1
1.11
1.2
1.2.1
1.3
1.4
1.5
1.5.1
1.6
1.7
1.8
1.8.1
1.9
2.*
2.0
2.0.1
2.1
2.1.1
2.2
2.2.1
2.2rc1
2.3
2.3rc1
2.4
2.4.1
2.4.2
2.5
2.5.1
2.6
2.7
2.7rc0
2.7rc1
3.*
3.0
3.0.1
3.0.2
3.0.3
3.0b0
3.0b1
3.0rc0
3.0rc1
3.1
3.1.1
3.10.0
3.10.1
3.11.0
3.11.0b0
3.11.0b1
3.11.0rc0
3.11.1
3.1rc0
3.2
3.2.1
3.2.2
3.2rc0
3.3.0
3.4.0
3.4rc0
3.5.0
3.5.1
3.6.0
3.6.1
3.6rc0
3.7.0
3.7.0b0
3.9.0
3.9.0b0
3.9.0b1
4.*
4.0
4.1.0
4.1.1
4.10.0
4.10.1
4.11
4.12.0
4.13.0
4.13.0.dev0
4.13.0.dev1
4.15.0
4.15.1
4.16.0
4.16.0.dev0
4.18.0
4.18.1
4.2.0
4.2.0b0
4.3.0
4.3.1
4.3.2
4.3.3
4.4.0
4.4.0b0
4.5.0
4.6.0
4.7.0
4.7.1
4.9
4.9.1

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-96749.json"
vanir_signatures 
[
    {
        "deprecated":  false,
        "digest":  {
            "line_hashes":  [
                "313937259246690792033577136582351186585",
                "234329394194398214755767972931697391149",
                "205556081000686217523895440862638542136",
                "302023848532793530739864523738009957657",
                "229744238530264298010148702012829395894",
                "289566845193397341247368850510323650999",
                "61373660942318224200464922469282204245",
                "1377657727013732018681638084855295901",
                "100276382119081194731334726091889527063",
                "49150128683341948243584376855512715628",
                "282432437761933900027570562394692470410",
                "161491051014087500058901029099508351084",
                "79846178355188504907962075812862958840",
                "339487331988713150960607797990096285080"
            ],
            "threshold":  0.9
        },
        "id":  "CVE-2026-96749-5d3a46dc",
        "signature_type":  "Line",
        "signature_version":  "v1",
        "source":  "https://github.com/mongodb/mongo-python-driver/commit/640dd2383a1a2fb1a10e5222d50ebc0b22a61bd7",
        "target":  {
            "file":  "bson/buffer.c"
        }
    },
    {
        "deprecated":  false,
        "digest":  {
            "function_hash":  "306396228315852703488053070048897984029",
            "length":  295
        },
        "id":  "CVE-2026-96749-ccd4fb31",
        "signature_type":  "Function",
        "signature_version":  "v1",
        "source":  "https://github.com/mongodb/mongo-python-driver/commit/640dd2383a1a2fb1a10e5222d50ebc0b22a61bd7",
        "target":  {
            "file":  "bson/buffer.c",
            "function":  "buffer_assure_space"
        }
    }
]
vanir_signatures_modified 
"2026-09-26T08:07:53Z"