CVE-2026-11352

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Source
https://cve.org/CVERecord?id=CVE-2026-11352
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-11352.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-11352
Aliases
Downstream
ALPINE (1)
BELL (1)
CGA (20)
DEBIAN (1)
JLSEC (1)
MINI (2)
openSUSE (1)
RHSA (2)
UBUNTU (1)
Related
Published
2026-07-03T06:12:10Z
Modified
2026-10-28T11:02:16Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
QUIC zero-length UDP datagrams busy-loop
Details

An issue in curl’s QUIC UDP receive function allows a malicious HTTP/3 server to trigger a remote denial of service against a curl or libcurl client. Because the helper function discards zero-length UDP datagrams before counting them toward the per-call packet budget, a connected QUIC peer can continuously stream empty datagrams to indefinitely stall the client.

Database specific 
{
    "cna_assigner":  "curl",
    "cwe_ids":  [
        "CWE-835"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/11xxx/CVE-2026-11352.json"
}
References

Affected packages

Git / github.com/curl/curl

Affected ranges

Type
GIT
Repo
https://github.com/curl/curl
Events
Introduced
2eebc58c4b8d68c98c8344381a9f6df4cca838fd
Fixed
68720b4837284335b2d63cb358f8f6ce65f5bc55
Database specific
Show details 
{
    "extracted_events":  [
        {
            "cpe":  "cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:*",
            "range":  [
                {
                    "introduced":  "8.18.0"
                },
                {
                    "fixed":  "8.21.0"
                }
            ],
            "source":  "CPE_RANGE"
        }
    ]
}
Type
GIT
Repo
https://github.com/curl/curl.git
Events
Introduced
6a3d0b6d631d5e9bec797306b5b41a9f440a088d
Fixed
56eca2afb4806f1032872fa97d1834b3c1385276
Database specific
Show details 
{
    "extracted_events":  [
        {
            "range":  [
                {
                    "introduced":  "6a3d0b6d631d5e9bec797306b5b41a9f440a088d"
                },
                {
                    "fixed":  "56eca2afb4806f1032872fa97d1834b3c1385276"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StandardRange"
        }
    ]
}

Affected versions

8.*
8.18.0
8.19.0
8.20.0
Other
curl-8_18_0
curl-8_19_0
curl-8_20_0
rc-8_18_0-3
rc-8_19_0-1
rc-8_19_0-2
rc-8_19_0-3
rc-8_20_0-1
rc-8_20_0-2
rc-8_20_0-3
rc-8_21_0-1
rc-8_21_0-2
rc-8_21_0-3

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-11352.json"
vanir_signatures 
[
    {
        "deprecated":  false,
        "digest":  {
            "line_hashes":  [
                "8724453169819657302314774805657094082",
                "261317499416676525855372847859961638644",
                "292487107086365306031949868405637843668",
                "309311828468822053510859394110150196214",
                "31135108115463552048891152615770408904",
                "57915329002755719217061593695510132297",
                "56509348555510414857213222953972427758",
                "31559790585369494778485528927910483629",
                "197903950728067412386560788602144590888",
                "87962793772792683778074868188172170356"
            ],
            "threshold":  0.9
        },
        "id":  "CVE-2026-11352-0410a26e",
        "signature_type":  "Line",
        "signature_version":  "v1",
        "source":  "https://github.com/curl/curl.git/commit/56eca2afb4806f1032872fa97d1834b3c1385276",
        "target":  {
            "file":  "lib/vquic/vquic.c"
        }
    },
    {
        "deprecated":  false,
        "digest":  {
            "function_hash":  "92915703145574751170747784747814977008",
            "length":  1810
        },
        "id":  "CVE-2026-11352-71d42987",
        "signature_type":  "Function",
        "signature_version":  "v1",
        "source":  "https://github.com/curl/curl.git/commit/56eca2afb4806f1032872fa97d1834b3c1385276",
        "target":  {
            "file":  "lib/vquic/vquic.c",
            "function":  "recvmsg_packets"
        }
    },
    {
        "deprecated":  false,
        "digest":  {
            "function_hash":  "112665705993807998852020689214883065967",
            "length":  2733
        },
        "id":  "CVE-2026-11352-cae54271",
        "signature_type":  "Function",
        "signature_version":  "v1",
        "source":  "https://github.com/curl/curl.git/commit/56eca2afb4806f1032872fa97d1834b3c1385276",
        "target":  {
            "file":  "lib/vquic/vquic.c",
            "function":  "recvmmsg_packets"
        }
    }
]
vanir_signatures_modified 
"2026-10-28T11:02:16Z"