PatchTheCVECVE-2026-55782: NanaZip is the 7-Zip derivative intended for the modern Windows experience
CVE-2026-55782 is a low-severity flaw (CVSS 2.4) affecting affected software. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
NanaZip is the 7-Zip derivative intended for the modern Windows experience. Prior to 6.5.1749.0, NanaZip's WebAssembly archive handler in NanaZip.Codecs.Archive.WebAssembly.cpp allocates buffers from attacker-controlled 32-bit section and custom-name length fields without validating them against the data present in the file. A tiny crafted module can force multi-gigabyte allocations during listing or extraction through NameSize, Information.Size,
Why this priority
- No elevated risk signals yet
No fix is published yet: follow the downgrade or mitigation steps.
Last updated 2026-10-25 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-55782?
No fixed release is listed yet. Watch the vendor advisory and apply any mitigation shown on this page.
Is CVE-2026-55782 being exploited?
CVE-2026-55782 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-55782 affect?
CVE-2026-55782 affects affected software. Severity is low (CVSS 2.4). NanaZip is the 7-Zip derivative intended for the modern Windows experience. Prior to 6.5.1749.0, NanaZip's WebAssembly archive handler in NanaZip.Codecs.Archive.WebAssembly.cpp allocates buffers from attacker-controlled 32-bit section and c
How urgent is CVE-2026-55782?
Priority 10/100. No elevated risk signals yet.
Software pages
Windows vulnerabilities · 7-Zip vulnerabilities