CVE-2026-19499 Affecting glibc package, versions <2.41-12+deb13u3+e5


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.38% (32nd percentile)

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  • Snyk IDSNYK-ECHOLATEST-GLIBC-19267829
  • published26 Aug 2026
  • disclosed14 Sept 2026

Introduced: 26 Aug 2026

NewCVE-2026-19499  (opens in a new tab)

How to fix?

Upgrade Echo:latest glibc to version 2.41-12+deb13u3+e5 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream glibc package and not the glibc package as distributed by Echo. See How to fix? for Echo:latest relevant fixed versions and status.

Calling strfmon and strfmon_l in the GNU C Library version 2.38 to 2.44 can write past the end of the caller-supplied output buffer when a conversion uses right-justified width padding.

Exploitation requires an application code path that calls strfmon or strfmon_l with right-justified width padding into a destination buffer that is large enough for the padding to succeed but too small for the internal memmove call. The field width or format may be attacker-influenced or a fixed susceptible pattern in the caller.

At the time of publication, no network-facing application impact is known.

CVSS Base Scores

version 3.1