CVE-2025-12889 TLS 1.2 Client Can Downgrade Digest Used
Low 2.3
Published
Updated
Check this codebase for CVE-2025-12889 and fix it if it is affected.
What it is: CVE-2025-12889 is a low-severity vulnerability in Wolfssl Wolfssl, published on 21 Nov 2025.
Exploitation: There is no known exploitation of CVE-2025-12889 in the wild and no public exploit code.
Affected product: Wolfssl Wolfssl. 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-2025-12889/ (Markdown: https://insights.sbomify.com/CVE-2025-12889/index.md)
- Exploited in the wild
- Not known
- Fix
- Available
What is CVE-2025-12889?
CVE-2025-12889 is a low-severity vulnerability in Wolfssl Wolfssl, published on 21 Nov 2025.
Official description
With TLS 1.2 connections a client can use any digest, specifically a weaker digest that is supported, rather than those in the CertificateRequest.
Weakness: CWE-20
Which versions are affected by CVE-2025-12889?
It affects 1 product.
Products include Wolfssl Wolfssl.
How do I fix CVE-2025-12889?
Upgrade to a fixed version.
Is CVE-2025-12889 being exploited?
There is no known exploitation of CVE-2025-12889 in the wild and no public exploit code.
Other vulnerabilities in Wolfssl Wolfssl
Sources
Also known as DEBIAN-CVE-2025-12889, GHSA-6wfx-6f8c-8wg4, JLSEC-2026-687, UBUNTU-CVE-2025-12889.