CVE-2026-58012: Glib: buffer over-read in g_regex_replace() via glib/gregex.c:string_append() and g_utf8_next_char()
CSIRTS triage
- What
- Buffer over-read can occur in g_regex_replace() due to certain function calls.
- Who is affected
- Users of Glib that utilize regex functionalities.
- Urgency
- This medium severity issue should be addressed to prevent potential data leaks.
- Action
- Update to the latest version of Glib.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58012
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2026-580120.39% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 32% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-58012 | coverage & exploitation status | NVD · CVE.org |
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