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CVE-2026-28810

3.7 · LOW

Generation of Predictable Numbers or Identifiers vulnerability in Erlang/OTP kernel (inet_res, inet_db modules) allows DNS Cache Poisoning.

Published Apr 7, 2026CWE-340EPSS 0.41%

Overview

CVE-2026-28810 is a low-severity vulnerability. It was published on April 7, 2026 and has a CVSS 3.1 base score of 3.7 (LOW).

This vulnerability has a CVSS 3.1 base score of 3.7, rated LOW. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

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 before OTP 28.4.2, OTP 27.3.4.10 an

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refcna.erlef.org/cves/CVE-2026-28810.htmlGitHubgithub.com/erlang/otp/commit/36f23c9d2cc54afe83671dd7343596d7972839a5GitHubgithub.com/erlang/otp/commit/b057a9d995017b1be50d6dc02edd52382f3231b8GitHubgithub.com/erlang/otp/commit/dd15e8eb03548c5e55e9915f0e91389ec6bad9fdGitHubgithub.com/erlang/otp/security/advisories/GHSA-v884-5jg5-whj8Refosv.dev/vulnerability/EEF-CVE-2026-28810Refwww.erlang.org/doc/system/versions.html#order-of-versions

How CyberStrike helps

Frequently asked questions

What is CVE-2026-28810?

CVE-2026-28810 is a low-severity vulnerability. It was published on April 7, 2026 and has a CVSS 3.1 base score of 3.7 (LOW).

How severe is CVE-2026-28810?

This vulnerability has a CVSS 3.1 base score of 3.7, rated LOW. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-28810?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-28810?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-28810 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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