Generation of Predictable Numbers or Identifiers in otp - CVE-2026-28810
Published: April 10, 2026
Vulnerability identifier: #VU125776
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-28810
CWE-ID: CWE-340
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: erlang
Affected software:
otp
otp
Detailed vulnerability description
The vulnerability allows a remote attacker to poison the DNS cache.
The vulnerability exists due to generation of predictable numbers or identifiers in the inet_res built-in DNS resolver when processing UDP DNS queries. A remote attacker can forge a DNS response with a predicted transaction ID to poison the DNS cache.
Exploitation is practical for an attacker who can observe one query or predict the next transaction ID.
How to mitigate CVE-2026-28810
Install security update from vendor's website.