CVE-2026-116733 flatcc through 0.6.4 Out-of-Bounds Read via __flatcc_json_parser_number
Medium 6.3
Published
Updated
Check this codebase for CVE-2026-116733 and fix it if it is affected.
What it is: CVE-2026-116733 is a medium-severity vulnerability in dvidelabs flatcc, published on 26 Oct 2026.
Exploitation: There is no known exploitation of CVE-2026-116733 in the wild and no public exploit code.
Affected product: dvidelabs flatcc. 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-2026-116733/ (Markdown: https://insights.sbomify.com/CVE-2026-116733/index.md)
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-116733?
CVE-2026-116733 is a medium-severity vulnerability in dvidelabs flatcc, published on 26 Oct 2026.
Official description
flatcc through 0.6.4 contains an out-of-bounds read vulnerability in __flatcc_json_parser_number that allows attackers to read past the input buffer via numbers ending in a decimal point. Attackers can supply untrusted JSON ending immediately after a decimal point to generated parsers, crashing applications when the buffer ends at an unmapped page.
Weakness: CWE-125
Which versions are affected by CVE-2026-116733?
How do I fix CVE-2026-116733?
No fix has been published for CVE-2026-116733 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-116733 being exploited?
There is no known exploitation of CVE-2026-116733 in the wild and no public exploit code.
Sources
Also known as GHSA-ffg2-pv59-mvp5.