CVE-2026-38973: mrubyc through release3.4.1 was found to contain an out-of-bounds read in builtin missing-method lookup inside mrbc_find_method().

mediumCVSS 4.4CVE-2026-38973

mrubyc through release3.4.1 was found to contain an out-of-bounds read in builtin missing-method lookup inside mrbc_find_method().

Details

Source: NVD Recent CVEs (US · database · site)
Severity: medium — CVSS 4.4
Published: 2026-07-06
Last updated: 2026-07-09
Exploitation: Not in CISA KEV at last sync

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-38973

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-2026-389730.12% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 2% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-38973	coverage & exploitation status	NVD · CVE.org

Recent advisories for mrubyc

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

highCVE-2026-38976: mrubyc through 3.4.1 was found to contain a NULL pointer dereference in src/vm.c in op_super()…nvd · 2026-07-06

CVE-2026-38973: mrubyc through release3.4.1 was found to contain an out-of-bounds read in builtin missing-method lookup inside mrbc_find_method().

Details

Exploitation outlook

Referenced CVEs

Recent advisories for mrubyc

More from NVD Recent CVEs