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mruby vulnerabilities

Vulnerabilities published for mruby in the last 30 days: 0. Listed in the KEV catalogue: 0.

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Vulnerabilities: 42

  1. CVE-2026-79590

    Medium · CVSS 6.5EPSS 0.37%No fix published

    CVE-2026-79590

    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.

    Published Updated
  2. CVE-2022-4996

    Medium · CVSS 6.9EPSS 0.64%No fix published

    mruby bigint.c udiv floating point comparison with incorrect operator

    A flaw has been found in mruby 3.1.0. Affected is the function udiv of the file bigint.c. Executing a manipulation can lead to floating point comparison with incorrect operator. It is possible to launch the attack remotely. The exploit has been published and may be used. It is best practice to apply a patch to resolve this issue.

    Published Updated
  3. CVE-2026-1979

    Medium · CVSS 4.8EPSS 0.18%No fix published

    mruby JMPNOT-to-JMPIF Optimization vm.c mrb_vm_exec use after free

    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.

    Published Updated
  4. CVE-2025-13120

    Medium · CVSS 4.8EPSS 0.16%No fix published

    mruby array.c sort_cmp use after free

    A vulnerability has been found in mruby up to 3.4.0. This vulnerability affects the function sort_cmp of the file src/array.c. Such manipulation leads to use after free. An attack has to be approached locally. The exploit has been disclosed to the public and may be used. The name of the patch is eb398971bfb43c38db3e04528b68ac9a7ce509bc. It is advisable to implement a patch to correct this issue.

    Published Updated
  5. CVE-2025-12875

    Medium · CVSS 4.8EPSS 0.17%No fix published

    mruby array.c ary_fill_exec out-of-bounds write

    A weakness has been identified in mruby 3.4.0. This vulnerability affects the function ary_fill_exec of the file mrbgems/mruby-array-ext/src/array.c. Executing a manipulation of the argument start/length can lead to out-of-bounds write. The attack needs to be launched locally. The exploit has been made available to the public and could be used for attacks. This patch is called 93619f06dd378db6766666b30c08978311c7ec94. It is best practice to apply a patch to resolve this issue.

    Published Updated
  6. CVE-2025-7207

    Medium · CVSS 4.8EPSS 0.26%No fix published

    mruby nregs codegen.c scope_new heap-based overflow

    A vulnerability, which was classified as problematic, was found in mruby up to 3.4.0-rc2. Affected is the function scope_new of the file mrbgems/mruby-compiler/core/codegen.c of the component nregs Handler. The manipulation leads to heap-based buffer overflow. An attack has to be approached locally. The exploit has been disclosed to the public and may be used. The name of the patch is 1fdd96104180cc0fb5d3cb086b05ab6458911bb9. It is recommended to apply a patch to fix this issue.

    Published Updated

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