High severity · published Oct 26, 2026
CVE-2026-115907
zip: legacy Shrink/Reduce/Implode decoder: denial of service from attacker-controlled ZIP64 uncompressed size
New
7.5
CVSS
0.4%
EPSS
No
On KEV
Description
zip is a zip library for Rust that supports reading and writing simple ZIP files. From 5.1.0 until 9.0.0, applications built with the legacy-zip feature can reserve output capacity from an attacker-controlled ZIP64 uncompressed size before validating the compressed stream. The ShrinkDecoder path in src/legacy/shrink.rs can panic with a capacity overflow during ZipArchive::extract, and the Reduce and Implode decoders contain the same unbounded preallocation pattern. An unhandled panic can terminate an archive-processing service. This issue is fixed in version 9.0.0.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 28% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
ZI
zip2 · zip-rs
>= 5.1.0, < 9.0.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-115907
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-115907
github.com
https://github.com/zip-rs/zip2/commit/8b4991288b79ad11cce201c2d785d5baa795bd3e
github.com
https://github.com/zip-rs/zip2/pull/991
github.com
https://github.com/zip-rs/zip2/releases/tag/v9.0.0
github.com
https://github.com/zip-rs/zip2/security/advisories/GHSA-9hj8-73fh-9963
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