CVE-2026-56858: Fix Javascript regexp context tracking in html/template

Overview

Severity

Medium (CVSS 6.1)

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Exploit Status

Not Exploited

Patch Tuesday

2026-Aug

Released

2026-08-20

Last Updated

2026-09-17

EPSS Score

0.31% (percentile: 21.6%)

Affected Products (4)

Other

• 21778-17084
• 21857-17084
• 21660-17084
• 21676-17084

Security Updates (1)

• Security Update

Revision History

• 2026-08-20: Information published.
• 2026-09-03: Information published.
• 2026-09-08: Information published.
• 2026-09-09: Information published.
• 2026-09-17: Information published.