CVE-2026-11586

By default, curl automatically responds to WebSocket PING frames. Because curl lacks an upper bound on memory allocation for unacknowledged frames, a malicious server can exhaust all available memory by flooding curl with rapid, sequential PING messages.

Database specific

{
    "cna_assigner":  "curl",
    "cwe_ids":  [
        "CWE-770"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/11xxx/CVE-2026-11586.json",
    "unresolved_ranges":  [
        {
            "extracted_events":  [
                {
                    "introduced":  "8.16.0"
                },
                {
                    "fixed":  "8.16.1"
                },
                {
                    "introduced":  "8.17.0"
                },
                {
                    "fixed":  "8.20.1"
                },
                {
                    "introduced":  "0b091328773c64e23f5c4739da74527093c6a5ab"
                },
                {
                    "fixed":  "849317ff5c5a5e13f50ec3d001e46ddffa77d8a4"
                }
            ],
            "source":  "AFFECTED_FIELD"
        }
    ]
}

References

Affected packages

Git / github.com/curl/curl

Affected ranges

Type

GIT

Repo

https://github.com/curl/curl

Events

Introduced

a05f34973e6c4bb629d018f7cb51487be1c904d8

Fixed

68720b4837284335b2d63cb358f8f6ce65f5bc55

Database specific

Show details

{
    "cpe":  "cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:*",
    "extracted_events":  [
        {
            "introduced":  "8.20.0"
        },
        {
            "last_affected":  "8.20.0"
        },
        {
            "introduced":  "8.19.0"
        },
        {
            "last_affected":  "8.19.0"
        },
        {
            "introduced":  "8.18.0"
        },
        {
            "last_affected":  "8.18.0"
        },
        {
            "introduced":  "8.17.0"
        },
        {
            "last_affected":  "8.17.0"
        },
        {
            "introduced":  "8.16.0"
        },
        {
            "last_affected":  "8.16.0"
        },
        {
            "fixed":  "8.21.0"
        }
    ],
    "source":  [
        "AFFECTED_FIELD",
        "CPE_RANGE"
    ]
}

Affected versions

8.*

8.16.0

8.17.0

8.18.0

8.19.0

8.20.0

Other

curl-8_20_0

rc-8_21_0-1

rc-8_21_0-2

rc-8_21_0-3

Database specific

source

"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-11586.json"