🛡️ CVE-2026-45820

⚪ Unknown ✅ No Known Exploit CWE-400 NVD
N/A
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

fflate through 0.8.2 is vulnerable to denial of service via an infinite loop in unzipSync(). A crafted ZIP archive with a central directory entry declaring compressed_size=0xFFFFFFFF (ZIP64 sentinel) but missing the required ZIP64 extra field tag 0x0001 causes z64e() to loop indefinitely due to out-of-bounds reads returning undefined, which coerces to 0, keeping the loop condition permanently true.

Weakness class

CVE-2026-45820 is classified as CWE-400: Uncontrolled Resource Consumption. A request can consume memory, CPU or storage without limit, exhausting capacity for everyone else.

Affected software

CVE-2026-45820 is recorded against 1 package.

  • unknown

Timeline and source

Published on 22 July 2026 and last revised on 23 July 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

github.com
www.npmjs.com

Details

Severity Unknown
CVSS Score N/A
CVSS Vector N/A
CWE CWE-400
Public Exploit ✅ No
Source NVD
Published 2026-07-22
Updated 2026-08-11
Modified 2026-07-23
Fix URL N/A

Affected Packages

Software From version Fixed in
unknown — —

Similar Threats

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