VulnerabilityReceived

CVE-2026-79590

A NULL pointer dereference vulnerability exists in the Prism parser component of mruby 4.0.0.

UnscoredEPSS 0.15%

Does this matter?

Not yet scored. NVD analysis is pending; check back once CVSS and EPSS values are published.

Description

A NULL pointer dereference vulnerability exists in the Prism parser component of mruby 4.0.0. An attacker can provide a specially crafted Ruby source file that triggers the parser to pass a NULL pointer to nonnull string handling functions, resulting in undefined behavior and application crash.

CVSS: Not yet scored
EPSS: 0.15% probability · 5th percentile
CISA KEV: Not listed
Source: cve@mitre.org

References

https://github.com/mruby/mruby/issues/7032
https://github.com/takumin/mruby/commit/c6866eed4ad5640b552ba79d16063e7ec70a0ac9

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.