UpHeron
All vulnerabilities

Servers and applications

CVE-2026-54887

Use of Default Cryptographic Key vulnerability in Erlang/OTP ssl (DTLS server) allows predictable DTLS cookie computation during the startup window, enabling source address verification bypass. On DTLS server startup, dtls_server_connection:initial_hello/3 initializes previous_cookie_secret to the empty binary (<<>>) instead of a random value. Because HMAC with an empty key is deterministic,…

Severity
Medium 6.3
Published
2 Jul 2026
Last changed
24 Jul 2026
Added to UpHeron
16 Oct 2026
Fixed in
27.3.4.14, 28.5.0.3, 29.0.3
Sources
NVD

Affected software

SoftwareAffected versions
Erlang/OTPServers and applications · cpe:a:erlang:erlang\/otp
  • From 20.0 before 27.3.4.14
  • From 28.0 before 28.5.0.3
  • From 29.0 before 29.0.3

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2026-54887
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2026-54887