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CVE-2026-115909: zip: Unbounded Symlink-Target Handling Can Abort Or Exhaust Memory During Extraction

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-26 · updated 2026-10-26
• Weakness: CWE-400

Description

zip is a zip library for Rust that supports reading and writing simple ZIP files. From 1.3.0 until 9.0.0, ZipArchive::extract in src/read/mod.rs calls Vec::with_capacity for a symbolic link target using the attacker-controlled ZIP64 uncompressed_size before reading entry data. A small archive can request an impossible capacity, causing the infallible allocation path to abort the process before the entry is validated. The failure cannot be contained with catch_unwind or a worker thread, allowing repeated denial of service in archive-processing applications. This issue is fixed in version 9.0.0.

Affected products

• zip-rs zip2: from 1.3.0, < 9.0.0

References

• https://github.com/zip-rs/zip2/commit/a543a1fc8f3f3eef36f27bb137230295284cdb98
• https://github.com/zip-rs/zip2/pull/984
• https://github.com/zip-rs/zip2/releases/tag/v9.0.0
• https://github.com/zip-rs/zip2/security/advisories/GHSA-q7v9-x93c-xqv3

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