Is there a public exploit for CVE-2026-18839?

No public exploit for CVE-2026-18839 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-18839?

CVE-2026-18839 scores CVSS 2.2 (v3.1), rated low. EPSS puts the chance of exploitation in the next 30 days at 0.13%.

What does CVE-2026-18839 affect?

CVE-2026-18839 affects Red Hat, rpm-software-management popt, Red Hat Hardened Images.

2.2 Low

An integer underflow was found in the popt library when formatting help text for option tables that exceed the terminal width.

CVE-2026-18839

An integer underflow was found in the popt library when formatting help text for option tables that exceed the terminal width. A local user who can cause an application to print help under those conditions may cause that application to crash or fail to display help, resulting in a denial of service of the affected application.

Assessment

CVSS: 2.2 (v3.1)
Severity: Low
EPSS: 0.13% chance of exploitation in the next 30 days
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 5 August 2026
Last updated: 6 November 2026
Affected: Red Hat · rpm-software-management · Red Hat Hardened Images · popt
Assigner: redhat

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

At the source

EUVD (ENISA)

References

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