CVE-2026-4358

A specially crafted aggregation query with $lookup by an authenticated user with write privileges can cause a double-free or use-after-free memory issue in the slot-based execution (SBE) engine when an in-memory hash table is spilled to disk.

Database specific

{
    "cna_assigner": "mongodb",
    "cwe_ids": [
        "CWE-415"
    ],
    "unresolved_ranges": [
        {
            "source": "AFFECTED_FIELD",
            "extracted_events": [
                {
                    "introduced": "8.2"
                },
                {
                    "fixed": "8.2.6"
                },
                {
                    "introduced": "8.0"
                },
                {
                    "fixed": "8.0.20"
                },
                {
                    "introduced": "7.0"
                },
                {
                    "fixed": "7.0.31"
                }
            ]
        }
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/4xxx/CVE-2026-4358.json"
}

References

Affected packages

Git / github.com/mongodb/mongo

Affected ranges

Type

GIT

Repo

https://github.com/mongodb/mongo

Events

Introduced

37d84072b5c5b9fd723db5fa133fb202ad2317f1

Fixed

ef9c90f7aba16cf5906f8665bb479f89c5aa4a2b

Introduced

b41cda4fe697dce6fd9b83b3805362ccc02fbeb3

Fixed

05009bb976757189fd9bff4cebc5d803a6737a95

Introduced

b993867dce63dd366cd93e60f3f425ed716f6497

Fixed

32a732a9b646200050bedd569d0e18fda534f92c

Database specific

{
    "source": "CPE_RANGE",
    "cpe": "cpe:2.3:a:mongodb:mongodb:*:*:*:*:-:*:*:*",
    "extracted_events": [
        {
            "introduced": "7.0.0"
        },
        {
            "fixed": "7.0.31"
        },
        {
            "introduced": "8.0.0"
        },
        {
            "fixed": "8.0.20"
        },
        {
            "introduced": "8.2.0"
        },
        {
            "fixed": "8.2.6"
        }
    ]
}

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

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-4358.json"

vanir_signatures

[
    {
        "id": "CVE-2026-4358-074a18d5",
        "signature_type": "Line",
        "signature_version": "v1",
        "source": "https://github.com/mongodb/mongo/commit/32a732a9b646200050bedd569d0e18fda534f92c",
        "deprecated": false,
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "212916051933611333336019566765871154533",
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            ]
        },
        "target": {
            "file": "src/mongo/util/md5.cpp"
        }
    },
    {
        "id": "CVE-2026-4358-1abd9456",
        "signature_type": "Line",
        "signature_version": "v1",
        "source": "https://github.com/mongodb/mongo/commit/05009bb976757189fd9bff4cebc5d803a6737a95",
        "deprecated": false,
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
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            ]
        },
        "target": {
            "file": "src/mongo/util/md5.cpp"
        }
    },
    {
        "id": "CVE-2026-4358-3141a725",
        "signature_type": "Function",
        "signature_version": "v1",
        "source": "https://github.com/mongodb/mongo/commit/05009bb976757189fd9bff4cebc5d803a6737a95",
        "deprecated": false,
        "digest": {
            "function_hash": "22528191371751663195701634984920870034",
            "length": 244.0
        },
        "target": {
            "function": "md5_init",
            "file": "src/mongo/util/md5.cpp"
        }
    },
    {
        "id": "CVE-2026-4358-de078695",
        "signature_type": "Function",
        "signature_version": "v1",
        "source": "https://github.com/mongodb/mongo/commit/32a732a9b646200050bedd569d0e18fda534f92c",
        "deprecated": false,
        "digest": {
            "function_hash": "253896680426164393151009864932457722232",
            "length": 57.0
        },
        "target": {
            "function": "md5_init_state",
            "file": "src/mongo/util/md5.cpp"
        }
    }
]

vanir_signatures_modified

"2026-07-15T21:57:36Z"