CVE-2026-86547

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Source
https://cve.org/CVERecord?id=CVE-2026-86547
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-86547.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-86547
Published
2026-09-09T10:07:25Z
Modified
2026-09-12T03:30:52Z
Severity
  • 6.9 (Medium) CVSS_V4 - CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CVSS Calculator
Summary
mrubyc through 4.0.0 NULL Pointer Dereference via OP_ENTER
Details

mrubyc through 4.0.0 contains a null pointer dereference vulnerability in the op_enter() handler in src/vm.c when processing untrusted bytecode. Attackers can craft malicious .mrb bytecode files with OP_ENTER instructions at the top level to crash the embedding application and cause denial of service.

Database specific 
{
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
        "CWE-476"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/86xxx/CVE-2026-86547.json"
}
References

Affected packages

Git / github.com/mrubyc/mrubyc

Affected ranges

Type
GIT
Repo
https://github.com/mrubyc/mrubyc
Events
Introduced
4f904e0dea407e3cc47c29cb4bf717eecb2921c1
Fixed
434bccd609f2a3e90d6bb95c458621898bc6a508
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "2.0"
        },
        {
            "last_affected": "4.0.0"
        },
        {
            "introduced": "0"
        },
        {
            "fixed": "4.0.0"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "DESCRIPTION"
    ]
}

Affected versions

release2.*
release2.0
release2.1
release3.*
release3.1
release3.2
release3.2-beta1
release3.2-rc1
release3.3
release3.3.1
release3.4
release3.4.1

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-86547.json"