Vulnerability Report

CVE-2026-58012

Title: GLib GRegex Buffer Over-read

DoS

Proof Of Concept

No public PoC currently indexed for CVE-2026-58012.

CWE Category CWE-126

Published Date Jun 30, 2026

Modified Date Jul 02, 2026

Exploit Status Not Found

Score 6.5 CVSS v3.1

Exploit Probability (EPSS)

0.34%

Vulnerability Summary

CVE-2026-58012: A flaw was found in GLib. A buffer over-read can occur in the g_regex_replace function when used with the `G_REGEX_RAW` compile flag and case-change replacement escapes because the string_append 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.

Impacted Vendors

gnome 1

Reference Links

https://access.redhat.com/security/cve/CVE-2026-58012 https://bugzilla.redhat.com/show_bug.cgi?id=2492247 https://gitlab.gnome.org/GNOME/glib/-/issues/3918

CVSS v3.1

Source Entity [email protected]

Severity MEDIUM

6.5

Attack Vector

NETWORK

Complexity

LOW

Privileges

N/A

Interaction

NONE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

UNCHANGED

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

CVSS v3.1

Source Entity [email protected]

Severity HIGH

8.2

Attack Vector

NETWORK

Complexity

LOW

Privileges

N/A

Interaction

NONE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

UNCHANGED

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

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2026-58012 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

July 02, 2026 MODIFIED

Vulnerability data updated via NVD.

June 30, 2026 MODIFIED

Vulnerability data updated via NVD.

June 30, 2026 MODIFIED

Vulnerability data updated via NVD.

June 30, 2026 MODIFIED

Vulnerability data updated via NVD.

Attack Vector Matrix

Access Vector NETWORK

Complexity LOW

Privileges N/A

Interaction NONE

CVSS Vector String


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

Affected Stack

No specific products linked.