Medium severity5.3NVD Advisory· Published Feb 6, 2026· Updated Apr 29, 2026
CVE-2026-1979
CVE-2026-1979
Description
A flaw has been found in mruby up to 3.4.0. This affects the function mrb_vm_exec of the file src/vm.c of the component JMPNOT-to-JMPIF Optimization. Executing a manipulation can lead to use after free. The attack needs to be launched locally. The exploit has been published and may be used. This patch is called e50f15c1c6e131fa7934355eb02b8173b13df415. It is advisable to implement a patch to correct this issue.
Affected products
1Patches
1e50f15c1c6e1https://github.com/sysfce2/mrubyvia nvd-ref
Vulnerability mechanics
Generated by null/stub on May 9, 2026. Inputs: CWE entries + fix-commit diffs from this CVE's patches. Citations validated against bundle.
References
6- github.com/sysfce2/mruby/commit/e50f15c1c6e131fa7934355eb02b8173b13df415nvdPatch
- github.com/mruby/mruby/issues/6701nvdExploitIssue Tracking
- github.com/mruby/mruby/issues/6701nvdExploitIssue Tracking
- vuldb.comnvdThird Party AdvisoryVDB Entry
- vuldb.comnvdThird Party AdvisoryVDB Entry
- vuldb.comnvdPermissions RequiredVDB Entry
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