CVE-2026-58011: Glib: out-of-bounds read in glib/gdatetime.c:g_date_time_get_ymd via invalid gdatetime

mediumCVSS 6.5CVE-2026-58011

CSIRTS triage

vendor: Glib product: GlibOther

What: An out-of-bounds read occurs in 'g_date_time_get_ymd' due to invalid gdatetime.
Who is affected: Deployments of Glib that call the affected function with invalid data.
Urgency: Remediation is important due to the medium severity of the vulnerability.
Action: Update to the latest version of Glib to resolve this issue.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: medium — CVSS 6.5
Published: 2026-06-09
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58011

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-2026-580110.34% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 26% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-58011	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

mediumCVE-2026-58011: A flaw was found in GLib. An out-of-bounds read of only 2 bytes can occur in the g_date_time_g…nvd

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