CVE-2026-9758 Improper Certificate Validation in S2OPC
High 7.3
Published
Updated
Check this codebase for CVE-2026-9758 and fix it if it is affected.
What it is: CVE-2026-9758 is a high-severity vulnerability in Systerel S2OPC, published on 10 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-9758 in the wild and no public exploit code.
Affected product: Systerel S2OPC. 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-2026-9758/ (Markdown: https://insights.sbomify.com/CVE-2026-9758/index.md)
Attackers can bypass certificate validation in S2OPC by presenting untrusted certificates, undermining secure communication trust.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-9758?
CVE-2026-9758 is a high-severity vulnerability in Systerel S2OPC, published on 10 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Improper comparison with the certificates trusted list in S2OPC allows an attacker well-formed untrusted certificate to be considered trusted
Weakness: CWE-295
Which versions are affected by CVE-2026-9758?
How do I fix CVE-2026-9758?
No fix has been published for CVE-2026-9758 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-9758 being exploited?
There is no known exploitation of CVE-2026-9758 in the wild and no public exploit code.
Sources
Also known as GHSA-q89f-427x-5p67.