CVE-2026-26282
Out-of-Bounds Heap Read in NanaZip .NET Bundle Parser
Publication date: 2026-02-19
Last updated on: 2026-02-20
Assigner: GitHub, Inc.
Description
Description
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| m2team | nanazip | From 5.0.1252.0 (inc) to 6.0.1630.0 (exc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-126 | The product reads from a buffer using buffer access mechanisms such as indexes or pointers that reference memory locations after the targeted buffer. |
| CWE-125 | The product reads data past the end, or before the beginning, of the intended buffer. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability exists in NanaZip, an open source file archiver, in versions starting from 5.0.1252.0 up to but not including 6.0.1630.0. It is caused by a missing bounds check in the .NET Single File bundle header parser, which leads to an out-of-bounds heap read.
When a user opens a specially crafted file with a vulnerable version of NanaZip, it can cause the application to crash or leak heap data to the user.
The issue was fixed in version 6.0.1630.0.
How can this vulnerability impact me? :
The vulnerability can impact users by causing NanaZip to crash when opening a maliciously crafted file.
More seriously, it can lead to leakage of heap data, potentially exposing sensitive information stored in memory.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
I don't know
What immediate steps should I take to mitigate this vulnerability?
To mitigate this vulnerability, update NanaZip to version 6.0.1630.0 or later, as this version patches the out-of-bounds heap read issue.