CVE-2026-79856 Unauthenticated Buffer Overflow Vulnerability leads to Authentication Bypass in AOS-8
Critical 9.8
Published
Updated
Check this codebase for CVE-2026-79856 and fix it if it is affected.
What it is: CVE-2026-79856 is a critical vulnerability in Hewlett Packard Enterprise (HPE) ArubaOS (AOS), published on 22 Oct 2026.
Exploitation: There is no known exploitation of CVE-2026-79856 in the wild and no public exploit code.
Affected product: Hewlett Packard Enterprise (HPE) ArubaOS (AOS). 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-2026-79856/ (Markdown: https://insights.sbomify.com/CVE-2026-79856/index.md)
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-79856?
CVE-2026-79856 is a critical vulnerability in Hewlett Packard Enterprise (HPE) ArubaOS (AOS), published on 22 Oct 2026.
Official description
A buffer overflow vulnerability exists in the PAPI protocol of AOS-8 that could allow an unauthenticated remote attacker to circumvent existing authentication controls. Successful exploitation could allow an attacker to gain administrative access, modify system configurations, and access or manipulate sensitive data.
Weakness: CWE-119
Which versions are affected by CVE-2026-79856?
How do I fix CVE-2026-79856?
No fix has been published for CVE-2026-79856 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-79856 being exploited?
There is no known exploitation of CVE-2026-79856 in the wild and no public exploit code.
Sources
Also known as GHSA-5x4g-4q46-f9mw.