HIGHVulnerability
CVE-2026-86250
h3 versions before 2.0.1-rc.18 fail to validate the chunk count parsed from user-controlled cookie values in setChunkedCookie() and deleteChunkedCookie() functions. Attackers can send a crafted cookie header with an extremely large chunk count to trigger an O(n²) cleanup loop that hangs the server process.
Properties
- severity
- HIGH
- score
- 7.5
- cve_id
- CVE-2026-86250
- signal_observed_at
- 2026-09-18T21:50:21+00:00
- vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- published_at
- 2026-09-06T12:17:15.767
- last_modified
- 2026-09-18T18:17:18.657
Related Entities (2)
DESCRIBED_BY (1)
→[Source]NVD
HAS_WEAKNESS (1)
→[Weakness]Uncontrolled Resource Consumption
Explore deeper with Ninja Signal's threat intelligence graph