EUVD-2026-77470
GHSA-q8j4-vfvg-jrfr
Severity by source
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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Network-reachable via automated pipelines, no auth or interaction required in CI context; impact is crash-only (A:L), no C or I impact.
Primary rating from Vendor (VulDB).
CVSS VectorVendor: VulDB
Lifecycle Timeline
4DescriptionCVE.org
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.
AnalysisAI
Reachable assertion in the flatcc FlatBuffers compiler (versions 0.6.0-0.6.3) allows remote attackers to crash the compiler process by supplying a crafted schema file containing circular struct references. The analyze_struct() function in semantics.c proceeds into assertion-protected code paths even after the parser has already flagged a failure state, triggering an abort. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires that flatcc (versions 0.6.0-0.6.3) be invoked on a schema file supplied or influenced by the attacker. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | Real-world risk is low to moderate. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Apply the upstream fix by upgrading to a version of flatcc that incorporates commit f705032346ee39efd7d3848c50b73d455d28d06d (https://github.com/dvidelabs/flatcc/commit/f705032346ee39efd7d3848c50b73d455d28d06d). … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-617 – Reachable Assertion
View allSame technique Denial Of Service
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External POC / Exploit Code
Leaving vuln.today