CVE-2026-87897 A SSRF vulnerability found that enables access to internal Chrome Devtools Protocol APIs that can leak the JWT authentication token for another user.
Medium 4.6
Published
Updated
Check this codebase for CVE-2026-87897 and fix it if it is affected.
What it is: CVE-2026-87897 is a medium-severity vulnerability in Nextcloud whiteboard, published on 27 Oct 2026.
Exploitation: There is no known exploitation of CVE-2026-87897 in the wild and no public exploit code.
Affected product: Nextcloud whiteboard. 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-2026-87897/ (Markdown: https://insights.sbomify.com/CVE-2026-87897/index.md)
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-87897?
CVE-2026-87897 is a medium-severity vulnerability in Nextcloud whiteboard, published on 27 Oct 2026.
Official description
A SSRF vulnerability found that enables access to internal Chrome Devtools Protocol APIs that can leak the JWT authentication token for another user. A low privileged attacker could continually exploit this vulnerability to leak the JWT authentication token for another user when they start a recording, which then enables the attacker read/write access to the victim's Whiteboard.
Weakness: CWE-918
Which versions are affected by CVE-2026-87897?
How do I fix CVE-2026-87897?
No fix has been published for CVE-2026-87897 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-87897 being exploited?
There is no known exploitation of CVE-2026-87897 in the wild and no public exploit code.