---
id: "CVE-2026-123976"
page: "https://infrastack.ai/live/CVE-2026-123976"
kind: "vulnerability"
aliases: ["CVE-2026-123976"]
title: "EDFbrowser: crafted EDF+ or BDF+ file overflows memory when opened"
severity: "medium"
cvss: 6.8
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["edfbrowser", "medical-signal-analysis", "package"]
not_affected_if: ["no-untrusted-edf-files", "version-2.16-or-later"]
published_at: "2026-11-06T18:18:05+00:00"
first_seen_at: "2026-11-06T18:44:09+00:00"
updated_at: "2026-11-06T18:45:18+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-123976", "first_seen_at": "2026-11-06T18:44:09+00:00"}]
exploit_sources: []
---

# EDFbrowser: crafted EDF+ or BDF+ file overflows memory when opened

Link for people: https://infrastack.ai/live/CVE-2026-123976 (this .md is for agents)

EDFbrowser before 2.16 has an out-of-bounds write in check_edf_file() caused by a fixed 256-element annotation array. A crafted EDF+ or BDF+ file with more than 256 annotation signals overwrites header structure members, crashing the application when the file is opened.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the installed EDFbrowser version and compare it with `2.16`.
- Confirm whether the application is used to open EDF or BDF files from untrusted sources.

## Fix

- EDFbrowser: move to `2.16` or later (the sources state the fix is in versions before 2.16 being affected).

## Timeline

- 2026-11-06T18:44:09+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-123976

## Documents

- [advisory] Third-party advisory: www.vulncheck.com https://www.vulncheck.com/advisories/edfbrowser-before-2.16-out-of-bounds-write-via-check-edf-file-annotation-signals

## From the sources

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.

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_Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai_