CVE-2026-90786 Details
Description
A vulnerability was determined in Dvidelabs flatcc up to 0.6.3. This impacts the function align_order_members of the file src/compiler/semantics.c of the component Duplicate Symbol Handler. This manipulation causes reachable assertion. The attack can be initiated remotely. The exploit has been publicly disclosed and may be utilized. Patch name: 8b19ba4e992ebcad7f5970704d1afc5507fa5205. To fix this issue, it is recommended to deploy a patch.
A vulnerability exists in Dvidelabs Flatcc versions through 0.6.3 within the Duplicate Symbol Handler component. The issue arises in the align_order_members function, located in src/compiler/semantics.c. When a table member is declared twice, the second declaration's sorting key collapses to zero, causing a reachable assertion failure. This vulnerability can be exploited remotely by crafting a Flatbuffers schema that includes duplicate member names, leading to a denial-of-service condition by crashing the schema compiler.
Users can update to Flatcc version 0.6.4 or later, where this vulnerability has been fixed. Instructions for downloading the latest version are available on the Flatcc GitHub repository.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Sep 14, 2026CISA-ADP
Assessed Sep 15, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/dvidelabs/flatcc/ | [email protected] | Source CodeVendor |
| https://github.com/dvidelabs/flatcc/issues/387 | [email protected] | ExploitIssue TrackingTechnical DescriptionVendor |
| https://github.com/jimjag/flatcc/commit/8b19ba4e992ebcad7f5970704d1afc5507fa5205 | [email protected] | Source CodeVendor |
| https://vuldb.com/cve/CVE-2026-90786 | [email protected] | AdvisoryPermission Required |
| https://vuldb.com/submit/919201 | [email protected] | Issue TrackingPermission Required |
| https://vuldb.com/vuln/403292 | [email protected] | AdvisoryPermission Required |
| https://vuldb.com/vuln/403292/cti | [email protected] | Content Wall |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-617 | Reachable Assertion | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| Dvidelabs flatcc | <= 0.6.3 (semver) |
CPE
Remediation
| |
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Sep 15, 2026 | CVE Modified | CISA-ADP |
| Sep 14, 2026 | New CVE Received | [email protected] |