CVE-2026-90786Public exploitHinoki check available

Schema compiler crash via duplicate table members

Published Sep 14, 2026 · Updated Sep 14, 2026

Reachable assertion in Dvidelabs FlatCC 0.6.0 through 0.6.3 allows attackers to crash the schema compiler via duplicate table members. The align_order_members function computes an ordering key of zero for a repeated member and passes it to assert(k > 0) instead of rejecting the redefinition. Processing attacker-controlled .fbs schema text is required; a duplicate member deterministically terminates an assertion-enabled compiler.

CVSS severityUnavailable
Unscored
EPSS probability0.43%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Reachable assertion in Dvidelabs FlatCC 0.6.0 through 0.6.3 allows attackers to crash the schema compiler via duplicate table members. The align_order_members function computes an ordering key of zero for a repeated member and passes it to assert(k > 0) instead of rejecting the redefinition. Processing attacker-controlled .fbs schema text is required; a duplicate member deterministically terminates an assertion-enabled compiler.

The record

CVE
CVE-2026-90786
Published
Sep 14, 2026
Updated
Sep 14, 2026
Vendor
Dvidelabs
Product
FlatCC
Classifications
CWE-617, T1499.004
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 14, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 14, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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  1. Affected versionversion=0.6.0
  2. Affected versionversion=0.6.1
  3. Affected versionversion=0.6.2
  4. Affected versionversion=0.6.3

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

Dvidelabs · FlatCCversion=0.6.0; version=0.6.1; version=0.6.2; version=0.6.3

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-617Reachable Assertion
T1499.004Application or System Exploitation Flood

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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