SEPTEMBER 15, 2026
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Case File

CVE-2026-19499

HIGH · CVSS 7.7 Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-09-14 · Last synced 2026-09-15

CyberRota Analysis

AI-Generated

The GNU C Library versions 2.38 to 2.44 are vulnerable due to a flaw in the strfmon and strfmon_l functions, which can lead to buffer overflows when right-justified width padding is used with insufficiently sized destination buffers. This vulnerability could allow attackers to exploit applications that improperly handle user-influenced input, potentially leading to arbitrary code execution or data corruption. Organizations using affected versions of the GNU C Library, particularly those with custom applications that utilize these functions, should prioritize patching to mitigate potential risks.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Detected Signals
exploit

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-19499
Severity
HIGH
CVSS
7.7
EPSS
N/A

Original NVD Description

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.