CVE-2025-26618: high-severity vulnerability in erlang otp
SSH SFTP packet size not verified properly in Erlang OTP
Published · Updated
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7epss 0.5%
Erlang is a programming language and runtime system for building massively scalable soft real-time systems with requirements on high availability. OTP is a set of Erlang libraries, which consists of the Erlang runtime system, a number of ready-to-use components mainly written in Erlang. Packet size is not verified properly for SFTP packets. As a result when multiple SSH packets (conforming to max SSH packet size) are received by ssh, they might be combined into an SFTP packet which will exceed the max allowed packet size and potentially cause large amount of memory to be allocated. Note that situation described above can only happen for successfully authenticated users after completing the SSH handshake. This issue has been patched in OTP versions 27.2.4, 26.2.5.9, and 25.3.2.18. There are no known workarounds for this vulnerability.
CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H
Affected products
erlang · otpRelated CVEs — erlang otp
In the same product, most dangerous first.
CVE-2025-32433CRITICALErlang/OTP SSH Vulnerable to Pre-Authentication RCEEPSS 98.9%KEVCVE-2025-46712LOWErlang/OTP SSH Has Strict KEX ViolationsEPSS 0.6%CVE-2025-30211HIGHKEX init error results with excessive memory usageEPSS 0.5%CVE-2024-53846MEDIUMssl fails to validate incorrect extened key usageEPSS 0.3%