Is CVE-2026-48860 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-48860 being exploited in the wild.

How severe is CVE-2026-48860?

Informational severity, with a CVSS score of 7.5, published 10 June 2026.

Which products and versions are affected?

Erlang/OTP OTP ssl 26.0 to 27.3.4.12, 28.0 to 28.5.0.1, 29.0 to 29.0.1.

Is there a fix for CVE-2026-48860?

A patch was published on 2026-06-10. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-48860 attacked?

It is attacked from the adjacent network, in a software library.

Am I affected by CVE-2026-48860?

Check whether you run Erlang/OTP OTP ssl at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-48860: Erlang OTP auth bypass in inet_tls_dist LAN allowlist

CVE-2026-48860 · Severity: info · CVSS 7.5 · Published 2026-06-10

Erlang/OTP is a programming platform used to build highly scalable and distributed systems. A flaw in its secure communication module allows unauthorized users to bypass network restrictions intended to limit access to the local network. If an attacker possesses a valid security certificate from the same provider, they can gain full control over the system, potentially leading to data theft or service disruption.

Vendors: Erlang/OTP.

Quick answers

Is CVE-2026-48860 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-48860 being exploited in the wild.
How severe is CVE-2026-48860?: Informational severity, with a CVSS score of 7.5, published 10 June 2026.
Which products and versions are affected?: Erlang/OTP OTP ssl 26.0 to 27.3.4.12, 28.0 to 28.5.0.1, 29.0 to 29.0.1.
Is there a fix for CVE-2026-48860?: A patch was published on 2026-06-10. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-48860 attacked?: It is attacked from the adjacent network, in a software library.
Am I affected by CVE-2026-48860?: Check whether you run Erlang/OTP OTP ssl at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A logic error in the inet_tls_dist:check_ip/1 function causes a failure in LAN allowlist enforcement for Erlang distribution over TLS. The function incorrectly calls inet:sockname/1 (local address) instead of inet:peername/1 (remote address) to identify the connecting peer. Consequently, the subnet mask comparison compares the local IP against itself, always succeeding regardless of the actual remote IP. An attacker with a valid CA-signed TLS certificate can bypass the LAN restriction to gain full Erlang distribution access, enabling remote code execution via rpc:call/4. This affects OTP 26.0 through versions prior to 29.0.2, 28.5.0.2, and 27.3.4.13.

Affected products

Erlang OTP/ssl 26.0 to 27.3.4.12, 28.0 to 28.5.0.1, 29.0 to 29.0.1

Timeline

2026-06-10: disclosed
2026-06-10: advisory
2026-06-10: patched

References

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