CVE-2026-28810

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-28810
Generation of Predictable Numbers or Identifiers vulnerability in Erlang/OTP kernel (inet_res, inet_db modules) allows DNS Cache Poisoning. The built-in DNS resolver (inet_res) uses a sequential, process-global 16-bit transaction ID for UDP queries and does not implement source port randomization. Response validation relies almost entirely on this ID, making DNS cache poisoning practical for an attacker who can observe one query or predict the next ID. This conflicts with RFC 5452 recommendations for mitigating forged DNS answers. inet_res is intended for use in trusted network environments and with trusted recursive resolvers. Earlier documentation did not clearly state this deployment assumption, which could lead users to deploy the resolver in environments where spoofed DNS responses are possible. This vulnerability is associated with program files lib/kernel/src/inet_db.erl and lib/kernel/src/inet_res.erl. This issue affects OTP from OTP 17.0 until OTP 28.4.2, 27.3.4.10 and 26.2.5.19 corresponding to kernel from 3.0 until 10.6.2, 10.2.7.4 and 9.2.4.11.

3.7 /10

CVSS v3 : LOW

V3 Legend

Vector :

Exploitability : 2.2 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References
Link Resource
https://cna.erlef.org/cves/CVE-2026-28810.html Third Party Advisory
https://github.com/erlang/otp/commit/36f23c9d2cc54afe83671dd7343596d7972839a5 Patch
https://github.com/erlang/otp/commit/b057a9d995017b1be50d6dc02edd52382f3231b8 Patch
https://github.com/erlang/otp/commit/dd15e8eb03548c5e55e9915f0e91389ec6bad9fd Patch
https://github.com/erlang/otp/security/advisories/GHSA-v884-5jg5-whj8 Vendor Advisory
https://osv.dev/vulnerability/EEF-CVE-2026-28810 Third Party Advisory
https://www.erlang.org/doc/system/versions.html#order-of-versions Release Notes
Configurations

Configuration 1 (hide)

OR cpe:2.3:a:erlang:erlang\/otp:*:*:*:*:*:*:*:*
cpe:2.3:a:erlang:erlang\/otp:*:*:*:*:*:*:*:*
cpe:2.3:a:erlang:erlang\/otp:*:*:*:*:*:*:*:*
History

23 Apr 2026, 15:18

Type Values Removed Values Added
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 3.7
First Time Erlang erlang\/otp
Erlang
CPE cpe:2.3:a:erlang:erlang\/otp:*:*:*:*:*:*:*:*
References () https://cna.erlef.org/cves/CVE-2026-28810.html - () https://cna.erlef.org/cves/CVE-2026-28810.html - Third Party Advisory
References () https://github.com/erlang/otp/commit/36f23c9d2cc54afe83671dd7343596d7972839a5 - () https://github.com/erlang/otp/commit/36f23c9d2cc54afe83671dd7343596d7972839a5 - Patch
References () https://github.com/erlang/otp/commit/b057a9d995017b1be50d6dc02edd52382f3231b8 - () https://github.com/erlang/otp/commit/b057a9d995017b1be50d6dc02edd52382f3231b8 - Patch
References () https://github.com/erlang/otp/commit/dd15e8eb03548c5e55e9915f0e91389ec6bad9fd - () https://github.com/erlang/otp/commit/dd15e8eb03548c5e55e9915f0e91389ec6bad9fd - Patch
References () https://github.com/erlang/otp/security/advisories/GHSA-v884-5jg5-whj8 - () https://github.com/erlang/otp/security/advisories/GHSA-v884-5jg5-whj8 - Vendor Advisory
References () https://osv.dev/vulnerability/EEF-CVE-2026-28810 - () https://osv.dev/vulnerability/EEF-CVE-2026-28810 - Third Party Advisory
References () https://www.erlang.org/doc/system/versions.html#order-of-versions - () https://www.erlang.org/doc/system/versions.html#order-of-versions - Release Notes

07 Apr 2026, 09:16

Type Values Removed Values Added
New CVE
Information

Published : 2026-04-07 09:16

Updated : 2026-04-23 15:18

NVD link : CVE-2026-28810

Mitre link : CVE-2026-28810

CVE.ORG link : CVE-2026-28810

JSON object : View

Products Affected

erlang

  • erlang\/otp
CWE
CWE-340

Generation of Predictable Numbers or Identifiers