UpHeron
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Servers and applications

CVE-2026-23943

Improper Handling of Highly Compressed Data (Compression Bomb) vulnerability in Erlang OTP ssh (ssh_transport modules) allows Denial of Service via Resource Depletion. The SSH transport layer advertises legacy zlib compression by default and inflates attacker-controlled payloads pre-authentication without any size limit, enabling reliable memory exhaustion DoS. Two compression algorithms are…

Severity
Medium 6.9
Published
13 Mar 2026
Last changed
24 Jul 2026
Added to UpHeron
16 Oct 2026
Fixed in
26.2.5.18, 27.3.4.9, 28.4.1
Sources
NVD

Affected software

SoftwareAffected versions
Erlang/OTPServers and applications · cpe:a:erlang:erlang\/otp
  • From 17.0 before 26.2.5.18
  • From 27.0 before 27.3.4.9
  • From 28.0 before 28.4.1

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2026-23943
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2026-23943