CVE Explorer
CVE-2026-11352
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.
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"defaultStatus":"unaffected","product":"curl","vendor":"curl","versions":[{"lessThanOrEqual":"8.20.0","status":"affected","version":"8.20.0","versionType":"semver"},{"lessThanOrEqual":"8.19.0","status":"affected","version":"8.19.0","versionType":"semver"},{"lessThanOrEqual":"8.18.0","status":"affected","version":"8.18.0","versionType":"semver"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:fb010a73a1fe95d8962bf7471a9e743766000ec03d90972866785a739243c27c · sha256:2d315ca6b2b6e36c… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:fb010a73a1fe95d8962bf7471a9e743766000ec03d90972866785a739243c27c · sha256:2d315ca6b2b6e36c… · /containers/adp/0/metrics/0/cvssV3_1
CWE assertions
1 source assertion{"description":"CWE-835 Loop with Unreachable Exit Condition ('Infinite Loop')","lang":"en"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:fb010a73a1fe95d8962bf7471a9e743766000ec03d90972866785a739243c27c · sha256:2d315ca6b2b6e36c… · /containers/cna/problemTypes/0/descriptions/0
Source references
4 source assertions{"name":"www","url":"https://curl.se/docs/CVE-2026-11352.html"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:fb010a73a1fe95d8962bf7471a9e743766000ec03d90972866785a739243c27c · sha256:2d315ca6b2b6e36c… · /containers/cna/references/1
{"name":"json","url":"https://curl.se/docs/CVE-2026-11352.json"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:fb010a73a1fe95d8962bf7471a9e743766000ec03d90972866785a739243c27c · sha256:2d315ca6b2b6e36c… · /containers/cna/references/0
{"tags":["exploit"],"url":"https://hackerone.com/reports/3783438"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:fb010a73a1fe95d8962bf7471a9e743766000ec03d90972866785a739243c27c · sha256:2d315ca6b2b6e36c… · /containers/adp/0/references/0
{"name":"issue","url":"https://hackerone.com/reports/3783438"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:fb010a73a1fe95d8962bf7471a9e743766000ec03d90972866785a739243c27c · sha256:2d315ca6b2b6e36c… · /containers/cna/references/2
Attribution and limitations
- CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →
Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.