CVE-2026-116203 YesWiki before 4.7.0 Stored XSS via filtertags Action Parameters
Medium 5.3
Published
Updated
Check this codebase for CVE-2026-116203 and fix it if it is affected.
What it is: CVE-2026-116203 is a medium-severity vulnerability in yeswiki, published on 25 Oct 2026.
Exploitation: There is no known exploitation of CVE-2026-116203 in the wild and no public exploit code.
Affected product: yeswiki. 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-2026-116203/ (Markdown: https://insights.sbomify.com/CVE-2026-116203/index.md)
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-116203?
CVE-2026-116203 is a medium-severity vulnerability in yeswiki, published on 25 Oct 2026.
Official description
YesWiki before 4.7.0 contains a stored cross-site scripting vulnerability in the filtertags action, which echoes attacker-controlled token values without output encoding. Anonymous attackers can inject markup via action-attribute parameters that bypasses the allow_raw_html gate, executing JavaScript for every page viewer.
Weakness: CWE-79
Which versions are affected by CVE-2026-116203?
How do I fix CVE-2026-116203?
No fix has been published for CVE-2026-116203 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-116203 being exploited?
There is no known exploitation of CVE-2026-116203 in the wild and no public exploit code.
Sources
Also known as GHSA-2cq3-2fgh-69rq, GHSA-f53x-3gqx-xq76.