Is there a public exploit for CVE-2026-123976?

No public exploit for CVE-2026-123976 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-123976?

CVE-2026-123976 scores CVSS 6.8 (v4.0), rated medium.

What does CVE-2026-123976 affect?

CVE-2026-123976 affects Teunis van Beelen EDFbrowser.

6.8 Medium

EDFbrowser before 2.16 contains an out-of-bounds write vulnerability in checkedffile() that allows attackers to overflow the 256-element…

CVE-2026-123976

EDFbrowser before 2.16 contains an out-of-bounds write vulnerability in checkedffile() that allows attackers to overflow the 256-element annotch 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.

Assessment

CVSS: 6.8 (v4.0)
Severity: Medium
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 6 November 2026
Last updated: 6 November 2026
Affected: Teunis van Beelen · EDFbrowser
Assigner: VulnCheck

CVSS vectorCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

At the source

EUVD (ENISA)

References

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