# CVE-2026-11352

## Summary

- **CVE ID:** CVE-2026-11352
- **Severity:** HIGH
- **CVSS Score:** 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
- **CWE:** CWE-835
- **Published:** Jul 3, 2026
- **Last Modified:** Sep 17, 2026

## Description

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.

## Affected Products

- curl — curl (8.20.0)
- curl — curl (8.19.0)
- curl — curl (8.18.0)
- curl — curl (6a3d0b6d631d5e9bec797306b5b41a9f440a088d)

## References

- [CNA](https://curl.se/docs/CVE-2026-11352.json)
- [CNA](https://curl.se/docs/CVE-2026-11352.html)
- [CNA](https://hackerone.com/reports/3783438)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.71%
- **EPSS Percentile:** 52.1

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-18._