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VulnerabilityPublished Updated

CVE-2026-48860: Erlang OTP · Comparison Using Wrong Factors

Affects Erlang OTPSource CVE Database V5

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Not known to be exploited · CVSS 7.5 High : upgrade to 0209a6df65d605552b378273027b3968b35f26b4 soon.

Data as of 29 Oct 2026, 19:04 UTC

CVSS 4.0 base score
7.5High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.2% chance of exploitation in 30 days – higher than 11% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 0209a6df65d605552b378273027b3968b35f26b4, 11.2.12.9
CVSS:4.0/AV:A/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 10 Jun 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.

What to do

Upgrade OTP to 0209a6df65d605552b378273027b3968b35f26b4; ssl to 11.2.12.9.

Affected software

ProductAffectedFixed in
ErlangOTPAffected
  • >=26.0 <27.3.4.13
Fixed in–
ErlangOTPAffected
  • >=11.0 <11.2.12.9
Fixed in–
ErlangOTPAffected
  • ≥ 7a08c5507862a7011568506d0c17b1fdef30bee4, < 0209a6df65d605552b378273027b3968b35f26b4
Fixed in
  • 0209a6df65d605552b378273027b3968b35f26b4
GitHubsslpkg:github/sslOther threatsAffected
  • >=11.0 <11.2.12.9
Fixed in
  • 11.2.12.9

CPE configurations (1)

  • cpe:2.3:a:erlang:erlang\/otp:*:*:*:*:*:*:*:*

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

If you cannot patch yet, restrict access to trusted networks and carefully control issuance and use of CA-signed TLS certificates to limit potential exploitation.

Description

Reliance on IP Address for Authentication vulnerability in Erlang/OTP ssl (inet_tls_dist module) allows unauthenticated bypass of the distribution-over-TLS LAN allowlist. The inet_tls_dist:check_ip/1 function, which enforces a LAN allowlist for Erlang distribution over TLS, calls inet:sockname/1 instead of inet:peername/1 to obtain the peer's IP address. Because inet:sockname/1 returns the local socket address, both the local IP and the supposed peer IP resolve to the same value, causing the subnet mask comparison to always succeed regardless of the actual remote address. Any holder of a CA-signed TLS certificate can therefore bypass the LAN restriction and gain full Erlang distribution access to the node, including rpc:call/4 and code:load_binary/3. This vulnerability is associated with program file lib/ssl/src/inet_tls_dist.erl. This issue affects OTP from OTP 26.0 before OTP 27.3.4.13, OTP 28.5.0.2, and OTP 29.0.2, corresponding to ssl from 11.0 before 11.2.12.9, 11.6.0.2, and 11.7.2.

References

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