# CVE-2026-108772: bleenco abstruse Cache Endpoint download_cache.go filepath.Join path traversal

> Remote attackers can exploit a path traversal flaw in the cache endpoint to read arbitrary files from the server.

- **Severity:** Medium 6.9 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 11 Oct 2026
- **Updated:** 15 Oct 2026
- **Also known as:** GHSA-gf4x-37hh-w872

## What is CVE-2026-108772?

CVE-2026-108772 is a medium-severity path traversal vulnerability in bleenco abstruse, published on 11 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A security vulnerability has been detected in bleenco abstruse up to 2.1.0. This issue affects the function filepath.Join of the file server/api/worker/download_cache.go of the component Cache Endpoint. Such manipulation of the argument File leads to path traversal. The attack can be launched remotely. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

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

## Which versions are affected by CVE-2026-108772?


## How do I fix CVE-2026-108772?

No fix has been published for CVE-2026-108772 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-108772 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-108772 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-108772 and fix it if it is affected.

What it is: CVE-2026-108772 is a medium-severity path traversal vulnerability in bleenco abstruse, published on 11 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-108772 exists.

Affected product: bleenco abstruse. 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-2026-108772/ (Markdown: https://insights.sbomify.com/CVE-2026-108772/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-108772
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-108772
- OSV: https://osv.dev/vulnerability/CVE-2026-108772

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-108772/
Summaries are generated and may contain mistakes; the official description above is the record.