CVE-2026-58227Network attack vector

Node crash via cyclic certificate-chain recursion

Published Jul 27, 2026 · Updated Jul 27, 2026

Uncontrolled recursion in Erlang/OTP ssl allows remote attackers to crash a BEAM node with a crafted TLS or DTLS certificate chain. ssl_certificate:handle_incomplete_chain/5 passes an incomplete peer chain to build_certificate_chain/5, whose issuer walk revisits mutually cross-signed certificates without cycle detection or a depth limit. Only a network connection and partial handshake are required; recursion exhausts memory and terminates the node before authentication or handshake completion.

CVSS severity8.7
High
EPSS probability0.39%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Uncontrolled recursion in Erlang/OTP ssl allows remote attackers to crash a BEAM node with a crafted TLS or DTLS certificate chain. ssl_certificate:handle_incomplete_chain/5 passes an incomplete peer chain to build_certificate_chain/5, whose issuer walk revisits mutually cross-signed certificates without cycle detection or a depth limit. Only a network connection and partial handshake are required; recursion exhausts memory and terminates the node before authentication or handshake completion.

The record

CVE
CVE-2026-58227
Published
Jul 27, 2026
Updated
Jul 27, 2026
Vendor
Erlang
Product
Erlang/OTP
Classifications
CWE-674, CAPEC-130, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 27, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 27, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=10.2 <* changes=[{"at":"11.7.4","status":"unaffected"},{"at":"11.6.0.4","status":"unaffected"},{"at":"11.2.12.11","status":"unaffected"}]
  2. Affected versionversion=23.2 <* changes=[{"at":"29.0.4","status":"unaffected"},{"at":"28.5.0.4","status":"unaffected"},{"at":"27.3.4.15","status":"unaffected"}]
  3. Affected versionversion=addc42df113f8f15fc20e9dff45490b3ce0d3d6b <* changes=[{"at":"7db64720177961e04545681480d691c4be81c54d","status":"unaffected"},{"at":"241d43703989fec4b6bf637beaeb366d92dcc4c2","status":"unaffected"},{"at":"0307bff2c72b685c6bd952daaac6bd661c247d62","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Erlang · Erlang/OTPversion=10.2 <* changes=[{"at":"11.7.4","status":"unaffected"},{"at":"11.6.0.4","status":"unaffected"},{"at":"11.2.12.11","status":"unaffected"}]; version=23.2 <* changes=[{"at":"29.0.4","status":"unaffected"},{"at":"28.5.0.4","status":"unaffected"},{"at":"27.3.4.15","status":"unaffected"}]; version=addc42df113f8f15fc20e9dff45490b3ce0d3d6b <* changes=[{"at":"7db64720177961e04545681480d691c4be81c54d","status":"unaffected"},{"at":"241d43703989fec4b6bf637beaeb366d92dcc4c2","status":"unaffected"},{"at":"0307bff2c72b685c6bd952daaac6bd661c247d62","status":"unaffected"}]

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
8.7Erlang Ecosystem FoundationCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-674Uncontrolled Recursion
CAPEC-130Excessive Allocation
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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