Is there a public exploit for CVE-2026-58012?

No public exploit for CVE-2026-58012 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-2026-58012?

CVE-2026-58012 scores CVSS 6.5 (v3.1), rated medium. EPSS puts the chance of exploitation in the next 30 days at 0.49%.

What does CVE-2026-58012 affect?

CVE-2026-58012 affects Gnome, Red Hat Red Hat AI Inference Server 3.5, Red Hat OpenShift AI 3.4, Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux AI 3.5, Cert Manager support for Red Hat OpenShift release 1.17.

6.5 Medium

A flaw was found in GLib.

CVE-2026-58012

A flaw was found in GLib. A buffer over-read can occur in the gregexreplace function when used with the GREGEXRAW compile flag and case-change replacement escapes because the stringappend function processes matched substrings using UTF-8 functions that assume valid UTF-8 input, even when the string is treated as raw bytes. This vulnerability can cause a minor information disclosure of 1-5 bytes and a denial of service when the buffer over-read crosses a page boundary.

Assessment

CVSS: 6.5 (v3.1)
Severity: Medium
EPSS: 0.49% 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: 30 June 2026
Last updated: 5 November 2026
Affected: Gnome · Red Hat · Cert Manager support for Red Hat OpenShift release 1.17 · Cert Manager support for Red Hat OpenShift release 1.18 · Cert Manager support for Red Hat OpenShift release 1.19 · Cert Manager support for Red Hat OpenShift release 1.20
Assigner: redhat

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

At the source

EUVD (ENISA)

References

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