# CVE-2026-63502: Yeti: Path traversal in ExportTask name allows authenticated arbitrary file read and write

Status: published. Published: 2026-11-03. Updated: 2026-11-03.

Yeti bridges the gap between CTI and DFIR practitioners by providing a Forensics Intelligence platform and pipeline. Prior to 2.5.1, YETI derives ExportTask.file_name from the user-controlled task name and passes it to core/clients/file_storage/classes/local_storage.py without sanitizing traversal sequences or enforcing path confinement. A low-privileged authenticated user using the default local storage backend can call POST /api/v2/tasks/export/new with a traversal name and use ExportTask.file_contents through GET /api/v2/tasks/export/{export_id}/content to read files accessible to the YETI service account. Running ExportTask.run() can also write attacker-controlled export output to an attacker-selected writable path. The impact depends on the service account's filesystem permissions, and universal code execution is not established. This issue is fixed in version 2.5.1.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- yeti-platform / yeti: <= 2.5.0 (affected). Source: CNA: GitHub_M

## Severity and prioritization

- CVSS 3.1: 8.3 (high); CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L; source: CNA: GitHub_M

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-22

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://github.com/yeti-platform/yeti/security/advisories/GHSA-4q3w-w2g5-8wqq (CNA: GitHub_M; x_refsource_CONFIRM)

- https://github.com/yeti-platform/yeti/pull/1280 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/yeti-platform/yeti/commit/bfd7c2424dc05dea2d46b5b106b5071f959d5d5a (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/yeti-platform/yeti/releases/tag/2.5.1 (CNA: GitHub_M; x_refsource_MISC)

## Provenance

- CNA: GitHub_M: https://www.cve.org/CVERecord?id=CVE-2026-63502; retrieved 2026-11-03; source updated 2026-11-03

Revision: faa9f8a4646702ebd3ff1fc8e6d96c6e159c242b65819a4427712ad2b6eb8b28

Canonical: https://y2.dev/cve/CVE-2026-63502

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