CVE-2026-90698

A security flaw has been discovered in memcached 1.6.41/1.6.42/1.6.43. This vulnerability affects the function try_read_command_asciiauth of the file proto_text.c of the component mcmc Tokenizer. The manipulation results in out-of-bounds read. It is possible to launch the attack remotely. The exploit has been released to the public and may be used for attacks. Upgrading to version 1.6.44 is able to resolve this issue. The patch is identified as af05c9302bba508b736c3da1d5670f63fe8b7db4. You should upgrade the affected component.

Database specific

{
    "cna_assigner": "VulDB",
    "cwe_ids": [
        "CWE-119",
        "CWE-125"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90698.json"
}

References

Affected packages

Git / github.com/memcached/memcached

Affected ranges

Type

GIT

Repo

https://github.com/memcached/memcached

Events

Introduced

3824603965ecbd38e552a725dbfc4ff38ab40cb2

Fixed

af05c9302bba508b736c3da1d5670f63fe8b7db4

Fixed

e44dd0b01234bc0faf970e9225e3423e98022129

Database specific

Show details

{
    "extracted_events": [
        {
            "introduced": "1.6.41"
        },
        {
            "last_affected": "1.6.41"
        },
        {
            "introduced": "1.6.42"
        },
        {
            "last_affected": "1.6.42"
        },
        {
            "introduced": "1.6.43"
        },
        {
            "last_affected": "1.6.43"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "REFERENCES"
    ]
}

Affected versions

1.*

1.6.41

1.6.42

1.6.43

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-90698.json"

vanir_signatures

[
    {
        "deprecated": false,
        "digest": {
            "function_hash": "87616265187028658770558356675757886016",
            "length": 4717
        },
        "id": "CVE-2026-90698-1bf9ed80",
        "signature_type": "Function",
        "signature_version": "v1",
        "source": "https://github.com/memcached/memcached/commit/e44dd0b01234bc0faf970e9225e3423e98022129",
        "target": {
            "file": "proxy_network.c",
            "function": "proxy_backend_drive_machine"
        }
    },
    {
        "deprecated": false,
        "digest": {
            "line_hashes": [
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                "314159697350266939262407515038615038554",
                "226464374791845049828237704214876995299",
                "38162687027069075279019617923365261170",
                "229938624719703097178863501165533114932"
            ],
            "threshold": 0.9
        },
        "id": "CVE-2026-90698-337ef63f",
        "signature_type": "Line",
        "signature_version": "v1",
        "source": "https://github.com/memcached/memcached/commit/af05c9302bba508b736c3da1d5670f63fe8b7db4",
        "target": {
            "file": "proto_text.c"
        }
    },
    {
        "deprecated": false,
        "digest": {
            "function_hash": "193967388816917791512039834474788991166",
            "length": 2416
        },
        "id": "CVE-2026-90698-495b67ac",
        "signature_type": "Function",
        "signature_version": "v1",
        "source": "https://github.com/memcached/memcached/commit/af05c9302bba508b736c3da1d5670f63fe8b7db4",
        "target": {
            "file": "proto_text.c",
            "function": "try_read_command_asciiauth"
        }
    }
]

vanir_signatures_modified

"2026-09-16T08:09:44Z"