CVE-2026-56858

Public on 2026-08-13

Modified on 2026-08-15

Description

Previously, pathological inputs could close an unescaped '/' early, allowing for attack-controlled data to inject arbitrary content, potentially leading to XSS.

Severity

Medium

See what this means

CVSS v3 Base Score

6.1

See breakdown

Affected Packages

Platform	Package	Release Date	Advisory	Status
Amazon Linux 2 - Core	golang	2026-08-31	ALAS2-2026-3893	Fixed
Amazon Linux 2 - Golang1.11 Extra	golang			No Fix Planned
Amazon Linux 2 - Golang1.19 Extra	golang			No Fix Planned
Amazon Linux 2 - Golang1.9 Extra	golang			No Fix Planned
Amazon Linux 2023	golang	2026-08-31	ALAS2023-2026-2114	Fixed
Amazon Linux 2027 Preview	golang			Pending Fix

CVSS Scores

	Score Type	Score	Vector
Amazon Linux	CVSSv3	6.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

References

FAQs regarding Amazon Linux ALAS/CVE Severity Red Hat: CVE-2026-56858 Mitre: CVE-2026-56858