CVE-2021-26948 Null dereference in htmldoc
High 7.8
Published
Updated
Check this codebase for CVE-2021-26948 and fix it if it is affected.
What it is: CVE-2021-26948 is a high-severity vulnerability in htmldoc, published on 3 Mar 2022. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2021-26948 in the wild and no public exploit code.
Affected product: htmldoc. 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-2021-26948/ (Markdown: https://insights.sbomify.com/CVE-2021-26948/index.md)
Attackers can execute arbitrary code or cause denial of service via crafted HTML files in the htmldoc library.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2021-26948?
CVE-2021-26948 is a high-severity vulnerability in htmldoc, published on 3 Mar 2022. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
Null pointer dereference in the htmldoc v1.9.11 and before may allow attackers to execute arbitrary code and cause a denial of service via a crafted html file.
Which versions are affected by CVE-2021-26948?
It affects 1 product.
Products include Htmldoc Project Htmldoc.
How do I fix CVE-2021-26948?
Upgrade to a fixed version.
Is CVE-2021-26948 being exploited?
There is no known exploitation of CVE-2021-26948 in the wild and no public exploit code.
Other vulnerabilities in htmldoc
Sources
Also known as DEBIAN-CVE-2021-26948, GHSA-2crh-849q-gg8v, UBUNTU-CVE-2021-26948.