Denial of service in zip crate from attacker-controlled ZIP64 size
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Partial Red Hat: 13 without a fix
Attack profile from CVSS 3.1 · CNA. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-400.
Summary
The zip Rust library is affected from 5.1.0 before 9.0.0 in the zip2 and zip crates when built with the legacy-zip feature. Its legacy decoders reserve output capacity from an attacker-controlled ZIP64 uncompressed size before validating the compressed stream (CWE-789). An unauthenticated remote attacker who supplies a crafted archive can panic ZipArchive::extract and crash an archive-processing service (CWE-400).
Written with Claude Haiku 5.5 from the sources below · 2026-11-07
Description from the CNA
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| zip-rs | zip2 | 5.1.0 to before 9.0.0 | 9.0.0 | Patch available | CNA |
| — | zip (crates.io) | 5.1.0 to before 9.0.0 | 9.0.0 | Patch available | GHSA-9hj8-73fh-9963 |
- zip2 Vendorzip-rs Affected 5.1.0 to before 9.0.0 Fixed in 9.0.0 Patch available CNA
- zip (crates.io) Vendor— Affected 5.1.0 to before 9.0.0 Fixed in 9.0.0 Patch available GHSA-9hj8-73fh-9963
Remediation
Upgrade zip2 and zip to version 9.0.0, which fixes this issue. Red Hat's plan is none available for Ansible Automation Orchestrator 2026, Confidential Cluster Operator, Confidential Compute Attestation, Red Hat Ansible Automation Platform 2 and other products, and OpenShift Lightspeed has no fix planned.
Written with Claude Haiku 5.5 from the sources below · 2026-11-07
- Fix · CNA zip2 (zip-rs) Fixed in 9.0.0
- Fix · GHSA-9hj8-73fh-9963 zip (crates.io) Fixed in 9.0.0 Advisory →
Vendor assessments
Red Hat
Red Hat rating: Important. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Ansible Automation Orchestrator 2026 | Affected | No fix yet |
| Confidential Cluster Operator | Affected | No fix yet |
| Confidential Compute Attestation | Affected | No fix yet |
| OpenShift Lightspeed | Affected | No fix planned: Will not fix |
| Red Hat Ansible Automation Platform 2 | Affected | No fix yet |
| Red Hat Discovery 2 | Affected | No fix yet |
| Red Hat Enterprise Linux 10 | Affected | No fix yet |
| Red Hat Enterprise Linux 9 | Affected | No fix yet |
| Red Hat Enterprise Linux AI (RHEL AI) 3 | Affected | No fix yet |
| Red Hat Lightspeed Services for OCP | Affected | No fix yet |
| Red Hat OpenShift AI (RHOAI) | Affected | No fix yet |
| Red Hat Satellite 6 | Affected | No fix yet |
| Red Hat Trusted Profile Analyzer | Affected | No fix yet |
Not affected: 9 products
- Pen Drive Powered by Red Hat Lightspeed
- Red Hat Ansible Automation Platform 2
- Red Hat Ansible Automation Platform Ansible Core 2
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat Enterprise Linux command line assistant
- Red Hat Hardened Images
- Red Hat Quay 3
Timeline
- 2026-10-26 Threatist record created from CVE-2026-115907
- 2026-10-27 Priority changed: MEDIUM → LOW
- 2026-10-29 Alias added: GHSA-9hj8-73fh-9963
- 2026-10-29 Fix available: crates.io/[email protected] · GHSA-9hj8-73fh-9963
- 2026-10-29 CVSS score added · GHSA-9hj8-73fh-9963
- 2026-10-29 Weakness changed · GHSA-9hj8-73fh-9963
- 2026-10-29 6 new references · GHSA-9hj8-73fh-9963
- 2026-10-30 CISA SSVC decision points changed
- 2026-10-30 Priority changed: LOW → HIGH
- 2026-11-06 Affected versions changed · Red Hat
- 2026-11-06 CVSS score added · Red Hat
- 2026-11-07 Affected versions changed · Red Hat
References
More zip-rs vulnerabilities
- TI-2026-80483 Parser differential in Rust zip library allows file overwrite CVSS 4.0CRITICAL 10.0
- TI-2025-21198 zip Vulnerable to Incorrect Path Canonicalization During Archive Extraction, Leading to Arbitrary File Write CVSS 4.0HIGH 7.3
- TI-2026-80488 Authentication bypass in zip Rust crate lets modified AES entries pass CVSS 3.1MEDIUM 6.5
- TI-2026-80491 Excessive allocation in zip Rust crate aborts extraction of symlinks CVSS 3.1HIGH 7.5
- TI-2026-80490 Arbitrary file write outside extraction directory in Rust zip crate CVSS 3.1HIGH 7.4
Sources
- CVE-2026-115907 · CVE Program
- CVE-2026-115907 · NVD
- FIRST EPSS
- GHSA-9hj8-73fh-9963 · GitHub Advisory Database · CC BY 4.0
- CVE-2026-115907 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences