CVE-2026-8670 Insecure session handling on metrics web server
Critical 9.6
Published
Updated
Check this codebase for CVE-2026-8670 and fix it if it is affected.
What it is: CVE-2026-8670 is a critical vulnerability in syslink software AG Avantra, published on 22 May 2026.
Exploitation: There is no known exploitation of CVE-2026-8670 in the wild and no public exploit code.
Affected product: syslink software AG Avantra. 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-2026-8670/ (Markdown: https://insights.sbomify.com/CVE-2026-8670/index.md)
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-8670?
CVE-2026-8670 is a critical vulnerability in syslink software AG Avantra, published on 22 May 2026.
Official description
Insufficient session expiration vulnerability in syslink software AG Avantra on Linux, Windows allows Reusing Session IDs (aka Session Replay).
This issue affects Avantra: before 25.3.1.
Weakness: CWE-613
Which versions are affected by CVE-2026-8670?
It affects 1 product.
Products include Avantra Avantra.
How do I fix CVE-2026-8670?
No fix has been published for CVE-2026-8670 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-8670 being exploited?
There is no known exploitation of CVE-2026-8670 in the wild and no public exploit code.
Other vulnerabilities in syslink software AG Avantra
Sources
Also known as GHSA-rvw7-wx4g-rq78.