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Back to active CVEs
Medium · CVSS 6.3CVE-2026-116733

flatcc through 0.6.4 Out-of-Bounds Read via __flatcc_json_parser_numberCVE-2026-116733

Answer in brief

CVE-2026-116733 records a Medium severity (CVSS 6.3) vulnerability in flatcc through 0.6.4 Out-of-Bounds Read via __flatcc_json_parser_number. The current sources do not mark it as known exploited. The current feed maps dvidelabs/flatcc (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 26, 2026Updated Oct 26, 2026Source checked Oct 26, 2026First seen by HOL Oct 26, 2026Material review Oct 26, 2026
Upstream Advisory

Key facts

Risk
Medium · CVSS 6.3
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Not reported

Why this deserves its current priority

CVSS is 6.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps dvidelabs/flatcc (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
dvidelabs/flatccgeneric>=0 <=0.6.4Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for dvidelabs/flatcc.
  2. 2Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

  1. Published upstream

    Oct 26, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 26, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 26, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • Source referencehackmd.io
  • Source referencevulncheck.com
Upstream source 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.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • flatcc through 0.6.4 Out-of-Bounds Read via verifier check_headerSame dvidelabs/flatcc package
  • gbsplay through 0.0.103 Out-of-Bounds Read via mapper_map ROM Bank IndexAlso CWE-125
  • gbsplay through 0.0.103 Heap Out-of-Bounds Read via gbr_open GBR TitleAlso CWE-125
  • gbsplay through 0.0.103 Heap Out-of-Bounds Read via vgm_open in gbs.cAlso CWE-125
  • libfvde through 20260923 Heap Out-of-Bounds Read via libfvde_encrypted_metadata_read_type_0x0024Also CWE-125
  • libfvde through 20260923 Heap Out-of-Bounds Read via libfvde_encrypted_metadata_read_type_0x001aAlso CWE-125

Record context

Vulnerability class
Buffer Overflow
EPSS
Not reported
CWE IDs
CWE-125
Source
CVE List V5
Source checked
Oct 26, 2026
References
5 linked sources
Open source record