CVE-2026-59248: Unbounded HPACK/QPACK prefixed-integer decoding in Cowlib causes memory-exhaustion DoS

Overview

Severity

N/A

Exploit Status

Not Exploited

Patch Tuesday

2026-Jul

Released

2026-08-07

Last Updated

2026-09-13

EPSS Score

0.29% (percentile: 22.0%)

Affected Products (2)

Other

• 21829-17084
• 21657-17084

Security Updates (1)

• Security Update

Revision History

• 2026-08-07: Information published.
• 2026-09-09: Information published.
• 2026-09-13: Information published.