CVE-2026-32686Public exploitNetwork attack vector

BEAM VM crash via unbounded exponent parsing

Published May 7, 2026 · Updated May 7, 2026

Resource exhaustion in Eric Meadows-Jönsson Decimal before 3.0.0 allows remote attackers to crash the BEAM VM with crafted decimals. Decimal.new/1 accepts an exponent without a bound, and arithmetic, rounding, integer conversion, comparison, or normal/XSD formatting allocates memory proportional to that exponent. Exposure requires a consuming application to accept attacker-controlled decimals and invoke one of those operations; one value can exhaust memory and terminate the runtime.

CVSS severity6.9
Medium
EPSS probability0.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource exhaustion in Eric Meadows-Jönsson Decimal before 3.0.0 allows remote attackers to crash the BEAM VM with crafted decimals. Decimal.new/1 accepts an exponent without a bound, and arithmetic, rounding, integer conversion, comparison, or normal/XSD formatting allocates memory proportional to that exponent. Exposure requires a consuming application to accept attacker-controlled decimals and invoke one of those operations; one value can exhaust memory and terminate the runtime.

The record

CVE
CVE-2026-32686
Published
May 7, 2026
Updated
May 7, 2026
Vendor
Eric Meadows-Jönsson
Product
Decimal
Classifications
CWE-400, CAPEC-130, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 7, 2026CVE publishedPublication date reported by the CVE source.
  2. May 7, 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=0.1.0 <3.0.0
  2. Affected versionversion=bc11f4a2b6fb61fc1360a0ab4e79141bba918841 <6a523f3a73b8c9974540e21c7aa88f1258bb35ae

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Eric Meadows-Jönsson · Decimalversion=0.1.0 <3.0.0; version=bc11f4a2b6fb61fc1360a0ab4e79141bba918841 <6a523f3a73b8c9974540e21c7aa88f1258bb35ae

Published CVSS scores

6.9Erlang Ecosystem FoundationCVSS:4.0/AV:L/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 exploitPublished

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
CAPEC-130Excessive Allocation
T1499Endpoint Denial of Service

Public exploit references

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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