How to Fix CVE-2026-42479: n/a (Bundle Sibling)
By Sai Kiran Pandrala
Last verified: 2026-05-25
CVE-2026-42479 is a sibling vulnerability in the same vendor advisory as CVE-2026-42476. Applying the patched build named in the primary write-up closes this CVE as well.
| Severity | CVSS 5.5 - Medium |
|---|---|
| Actively exploited? | Not currently in CISA KEV |
| Affected | Same as the bundle - see CVE-2026-42476 |
| Fixed in | Same patched build as CVE-2026-42476 (See vendor advisory) |
| Type (CWE) | n/a |
What's different about CVE-2026-42479?
An out-of-bounds read vulnerability in VrmlData_IndexedLineSet::TShape in the VRML parser in Open CASCADE Technology (OCCT) V8_0_0_rc5 allows attackers to cause a denial of service via a crafted VRML file. The issue occurs because coordIndex values from parsed input are used as direct array indices without validation against the size of the coordinate array during geometry processing.
The technical impact and remediation are identical to the primary CVE in the bundle. The same vendor patch closes both.
How to fix CVE-2026-42479
Apply the patched build per the primary write-up: How to Fix CVE-2026-42476.
The patch installation procedure, verification commands, and interim mitigations are documented there. Reusing one runbook keeps the rollout consistent across the bundle.
Frequently asked questions
Is CVE-2026-42479 fixed by the same patch as CVE-2026-42476?
Yes. CVE-2026-42479 ships in the same vendor advisory as CVE-2026-42476. Applying the patched build named in the primary write-up closes both.
What is the CVSS score for CVE-2026-42479?
The CVSS base score is 5.5 (Medium).
Is it being exploited?
It is not currently listed in CISA KEV.
References
- Official vendor advisory: https://gist.github.com/sgInnora/dfba083d04906283e9c92aea78e2d94a
- NVD entry: https://nvd.nist.gov/vuln/detail/CVE-2026-42479
- CISA KEV catalog: https://www.cisa.gov/known-exploited-vulnerabilities-catalog
- Primary write-up: How to Fix CVE-2026-42476
*Part of the n/a bundle. Full procedure at CVE-2026-42476.*