# CVE-2026-66755: Apache Tika: Arbitrary Local File Read in ISArchiveParser

> An attacker can read arbitrary local files via path traversal in the ISA-Tab parser, exposing sensitive data to the Tika process.

- **Severity:** Medium 5.9 (`CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/AU:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 30 Jul 2026
- **Updated:** 1 Sep 2026
- **Also known as:** CLEANSTART-2026-SC57620, DEBIAN-CVE-2026-66755, GHSA-vrmh-37mg-28h3, UBUNTU-CVE-2026-66755, USN-8717-1

## What is CVE-2026-66755?

CVE-2026-66755 is a medium-severity path traversal vulnerability in Apache Tika, published on 30 Jul 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Relative Path Traversal in the ISA-Tab parser in Apache Software Foundation Apache Tika from 1.8 through 3.3.1, and 4.0.0-alpha-1, allows an attacker who can place files in a directory that the application subsequently parses to read arbitrary files accessible to the Tika process and have their contents emitted into the extracted text output, via a "Study Assay File Name" value in the ISA-Tab investigation file that traverses outside the dataset directory. Users are recommended to upgrade to version 3.3.2 or 4.0.0-beta-1, which fixes this issue.

Weakness: CWE-22 (Improper Limitation of a Pathname to a Restricted Directory)

## Which versions are affected by CVE-2026-66755?

It affects 1 product.


Products: Apache Tika.

## How do I fix CVE-2026-66755?

Upgrade to a fixed version.

## Is CVE-2026-66755 being exploited?

There is no known exploitation of CVE-2026-66755 in the wild and no public exploit code.

## Other vulnerabilities in Apache Tika

- [CVE-2019-10088](https://insights.sbomify.com/CVE-2019-10088/): Allocation of Resources Without Limits or Throttling in Apache Tika (high 8.8)
- [CVE-2025-66516](https://insights.sbomify.com/CVE-2025-66516/): Apache Tika has XXE vulnerability (high 8.4)
- [CVE-2025-54988](https://insights.sbomify.com/CVE-2025-54988/): Apache Tika PDF parser module: XXE vulnerability in PDFParser's handling of XFA (high 8.4)
- [CVE-2018-1335](https://insights.sbomify.com/CVE-2018-1335/): Command injection in org.apache.tika:tika-core (high 8.1)
- [CVE-2019-10094](https://insights.sbomify.com/CVE-2019-10094/): Allocation of Resources Without Limits or Throttling in Apache Tika (high 7.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-66755 and fix it if it is affected.

What it is: CVE-2026-66755 is a medium-severity path traversal vulnerability in Apache Tika, published on 30 Jul 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-66755 in the wild and no public exploit code.

Affected product: Apache Tika. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-66755/ (Markdown: https://insights.sbomify.com/CVE-2026-66755/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-66755
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-66755
- OSV: https://osv.dev/vulnerability/CVE-2026-66755

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-66755/
Summaries are generated and may contain mistakes; the official description above is the record.