Relative/Absolute Path Traversal (CWE-23/CWE-36) in decompress_impl that enables an arbitrary file write.

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS 4.0

8.3 · CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:L/SC:H/SI:H/SA:H · score source

EPSS

No dated EPSS signal available.

As published by the source; long descriptions are shortened.

Summary All versions of `sevenz-rust` fail to validate file paths when extracting in `decompress_impl` (the underlying function used in the exposed decompress api functions). This oversight allows a maliciously crafted archive to extract outside the extraction directory, from both relative paths such as `../../../...` or absolute paths like `C:\\...` or `/etc/...`, which could lead to file disclosure or remote command execution in combination with other flaws or social engineering.

Details The following line numbers will be referencing the latest version v0.6.1. The specific point of failure is at `de_funcs.rs::101` inside `decompress_impl`. ``` rust seven.for_each_entries(|entry, reader| { let dest_path = dest.join(entry.name()); extract_fn(entry, reader, &dest_path) })?; ``` When the function iterates through each entry, it blindly joins the entry name with the output directory before passing the path into `extract_fn`, `default_entry_extract_fn` unless specified otherwise by…

Published by the source

6 Aug 2026, 12:00 UTC

Last modified by the source

10 Aug 2026, 06:30 UTC

Source last checked

25 Oct 2026, 04:53 UTC

1. Revision 2 · amended · 25 Oct 2026

   Reviewed OSV alias/range/CVSS4 correction; package source scopes and original publication preserved. No customer finding resolved.

2. Revision 1 · created · 24 Oct 2026

   Published from osv record RUSTSEC-2026-0245

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# Patch Next advisory brief: rustsec-2026-0245

Advisory: Relative/Absolute Path Traversal (CWE-23/CWE-36) in `decompress_impl` that enables an arbitrary file write.
IDs: rustsec-2026-0245
Record: https://patchnext.com/advisories/rustsec-2026-0245 (revision 2, source checked 25 Oct 2026, 04:53 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 8.3)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor response not established. A vendor fix does not mean a deployment is fixed.

## Affected components
- crates.io sevenz-rust: affected >= 0.0.0-0

## Suggested inspection (read-only)
- crates.io sevenz-rust: check the installed version with your package manager.

## Supported action
No complete vendor fix is recorded. Follow the primary source's mitigation guidance and check this record again before closing anything.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on sevenz-rust.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/RUSTSEC-2026-0245 (OSV record RUSTSEC-2026-0245 lists affected ranges: crates.io sevenz-rust >=0.0.0-0)

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