CVE-2026-58436

ParseAcceptLanguage quadratic-time DoS via Locale middleware on unauthenticated requests

CVSS v4.0

8.7 HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

CVSS v3.1

7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS

0.34% chance of exploitation in the next 30 days, 26th percentile

Published

2026-08-13

Updated

2026-08-14

Proof-of-concept exploits (1)

• advisories/GHSA-fw57-jgch-pgf3

References

• CVE Record
• NVD entry

Related

• CVE-2026-58435
• CVE-2026-58438
• CVE-2026-58434
• CVE-2026-5844
• CVE-2026-58432
• CVE-2026-58440