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  4. CVE 2026 123976 edfbrowser before 216 out of bounds write via
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Back to active CVEs
Medium · CVSS 6.8CVE-2026-123976

EDFbrowser before 2.16 Out-of-Bounds Write via check_edf_file() Annotation SignalsCVE-2026-123976

Answer in brief

CVE-2026-123976 records a Medium severity (CVSS 6.8) vulnerability in EDFbrowser before 2.16 Out-of-Bounds Write via check_edf_file() Annotation Signals. The current sources do not mark it as known exploited. The current feed maps Teunis van Beelen/EDFbrowser (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 Nov 6, 2026Updated Nov 6, 2026Source checked Nov 6, 2026First seen by HOL Nov 6, 2026Material review Nov 6, 2026
Upstream Advisory

Record context

Vulnerability class
Memory Corruption
EPSS
Not reported
CWE IDs
CWE-787
Source
CVE List V5
Source checked
Nov 6, 2026
References
6 linked sources
Open source record

Key facts

Risk
Medium · CVSS 6.8
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 6.8. 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 Teunis van Beelen/EDFbrowser (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Teunis van Beelen/EDFbrowsergeneric>=0 <2.162.16

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Teunis van Beelen/EDFbrowser.
  2. 2Review the reported fix. Update Teunis van Beelen/EDFbrowser to 2.16 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Nov 6, 2026

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

  2. Source modified

    Nov 6, 2026

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

  3. First seen by HOL

    Nov 6, 2026

Sources and claim methodology

  • Source referencegitlab.com
  • Source referencegitlab.com
  • Source referencegitlab.com
  • Source referencegitlab.com
  • Source referencegitlab.com
  • Source referencevulncheck.com
Upstream source description

EDFbrowser before 2.16 contains an out-of-bounds write vulnerability in check_edf_file() that allows attackers to overflow the 256-element annot_ch array by supplying excessive annotation signals. Attackers can craft an EDF+ or BDF+ file with more than 256 annotation signals to overwrite edfhdrblock members, including the signal parameter pointer, crashing the application when opened.

Quoted source text, attributed separately from HOL analysis.