---
title: "CVE-2026-115905: zip: Critical Parser Differential & Security Control Bypass via Dual-Header Inconsistencies (Zip Cloaking) Leading to Arbitrary File Overwrite & RCE"
url: https://erroneo.us/security/cve/CVE-2026-115905/
description: "CVE-2026-115905 (zip (crates.io (Rust))): zip is a zip library for Rust that supports reading and writing simple ZIP files. Through 9.0.4, ZipArchive treats…"
type: vulnerability-record
section: "Security Digest"
date_published: 2026-10-26
date_modified: 2026-11-02
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2026-115905"
kev: false
cvss: 10
epss: 0.0032
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2026-115905: zip: Critical Parser Differential & Security Control Bypass via Dual-Header Inconsistencies (Zip Cloaking) Leading to Arbitrary File Overwrite & RCE

**Signal:** Critical and remotely reachable. No known exploitation yet, but it is network-reachable without credentials. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- Not in CISA KEV , but CISA’s SSVC assessment records a public proof-of-concept, so attack code exists.
- EPSS 0.3% , percentile 25: FIRST’s model estimates a 0.3% chance of exploitation activity in the next 30 days, higher than 25% of all scored CVEs (low). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Only applies if your dependency tree includes zip (crates.io (Rust)) <= 9.0.4, fixed in 9.0.5 . Check your lockfile, including transitive dependencies.

## What it is

zip is a zip library for Rust that supports reading and writing simple ZIP files. Through 9.0.4, ZipArchive treats Central Directory File Header filenames as authoritative while ZipStreamReader extracts using Local File Header filenames without reconciling the duplicate metadata in src/read/stream.rs. A crafted archive can therefore appear benign to a component that inspects the central directory but cause a streaming extractor to write a different attacker-selected path and content, potentially overwriting files used by a downstream service. This issue is fixed in version 9.0.5.

## Affected packages

- crates.io (Rust) `zip` <= 9.0.4 → fixed: 9.0.5

## Affected products (CVE record)

- zip-rs zip2: < 9.0.5

## Severity

- GitHub_M CVSS 4.0: 10 `CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:L`
- GitHub CVSS 4.0: 10.0 `CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:L`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation poc , automatable yes , technical impact total .
- FIRST EPSS (model of 2026-11-05): 0.32% probability of exploitation activity in the next 30 days; percentile 25.

## Sources

- [GitHub Advisory GHSA-m665-v7pm-7grj](https://github.com/advisories/GHSA-m665-v7pm-7grj)
- [CVE.org record CVE-2026-115905](https://www.cve.org/CVERecord?id=CVE-2026-115905)
- [NVD entry CVE-2026-115905](https://nvd.nist.gov/vuln/detail/CVE-2026-115905)
- [github.com](https://github.com/zip-rs/zip2/security/advisories/GHSA-m665-v7pm-7grj)
- [github.com](https://github.com/zip-rs/zip2/commit/8068ab480ccf8daa7411424e365fcdbe6d09443e)
- [github.com](https://github.com/zip-rs/zip2/releases/tag/v9.0.5)

---
Source page: https://erroneo.us/security/cve/CVE-2026-115905/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt