CVE-2026-79590

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Source

https://cve.org/CVERecord?id=CVE-2026-79590

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-79590.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-79590

Downstream

Published

2026-09-10T00:00:00Z

Modified

2026-09-24T08:34:25Z

Severity

6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H CVSS Calculator

Summary

[none]

Details

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.

Database specific

{
    "cna_assigner":  "mitre",
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/79xxx/CVE-2026-79590.json"
}

References

Affected packages

Git / github.com/takumin/mruby

Affected ranges

Type

GIT

Repo

https://github.com/takumin/mruby

Events

Introduced

Fixed

c6866eed4ad5640b552ba79d16063e7ec70a0ac9

Database specific

Show details

{
    "source":  "REFERENCES"
}

Affected versions

1.*

1.0.0

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-79590.json"

vanir_signatures

[
    {
        "deprecated":  false,
        "digest":  {
            "line_hashes":  [
                "299320156707072644351766599381672284948",
                "160045294839455634109678547094420768054",
                "202852509292430754778706357174299523567"
            ],
            "threshold":  0.9
        },
        "id":  "CVE-2026-79590-2d157a0b",
        "signature_type":  "Line",
        "signature_version":  "v1",
        "source":  "https://github.com/takumin/mruby/commit/c6866eed4ad5640b552ba79d16063e7ec70a0ac9",
        "target":  {
            "file":  "mrbgems/mruby-compiler/include/prism_xallocator.h"
        }
    }
]

vanir_signatures_modified

"2026-09-24T08:34:25Z"