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CVE-2026-58012

high

A flaw was found in GLib.

Vendor / product: Gnome — glib

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.

CVSS
8.2
8.2 (CVSS v3.1)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
Severity source: NVD CVSS v3.1 (nvd@nist.gov)
Timeline (UTC)
Published: 2026-06-30 13:19
Modified: 2026-10-29 23:16
NVD status: Modified
Last synced 7 hours ago
Verified against the source API 2026-10-29 23:32 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).

Affected products

gnome / glib <2.86.5, 2.88.0
redhat / enterprise_linux 6.0, 7.0, 8.0, 9.0, 10.0

Weakness classification (CWE)

CWE-126

Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.

Mitigation & advisories

Vendor advisory: https://gitlab.gnome.org/GNOME/glib/-/issues/3918

References

Data sources

NVD CVE API 2.0 — fetched 2026-10-29 23:32 UTC · record ↗

Learn the basics

Understanding CVEs and CVSS Scores

Related CVEs

CVE-2026-58015CVE-2026-58013CVE-2026-58014CVE-2026-58011CVE-2026-58010