CVE-2026-86547
Last modified
CVE-2026-86547 is a medium-severity vulnerability rated 6.2/10 on the CVSS scale. 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..
Description
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.
Metrics
Weakness Enumeration
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| mrubyc | mrubyc | >= 2.0, <= 4.0.0 |
References
Timeline
- Published
- Last Modified
- Status
- Received
Frequently Asked Questions
What is CVE-2026-86547?
How severe is CVE-2026-86547?
How do I fix CVE-2026-86547?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-8654Improper input validation in Delphix Continuous Data connect…8.7
- CVE-2026-86540knowns versions before 0.30.0 fail to validate the settings.…7.8
- CVE-2026-86541knowns versions before 0.30.0 contain a path traversal vulne…8.3
- CVE-2026-86542knowns before 0.30.0 fails to validate import names in the i…9.1
- CVE-2026-86543knowns versions before 0.30.0 serve the management API witho…9.8
- CVE-2026-86544knowns versions before 0.30.0 contain an authorization bypas…8.1
- CVE-2026-8655Multiple Memory overflow vulnerabilities in NetScaler ADC an…9.8
- CVE-2026-86550NuBrowser lacks protocol whitelist validation for the S.brow…6.5
- CVE-2026-8656Versions of the package jsondiffpatch before 0.7.6 are vulne…6.1
- CVE-2026-86564A flaw was found in DPDK lib/vhost. Missing length validatio…3.3
- CVE-2026-8657Versions of the package jsondiffpatch before 0.7.6 are vulne…8.2
- CVE-2026-8658OS Command Injection vulnerability in Rapid7 InsightConnect …8.8
Are you affected by CVE-2026-86547?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST