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VulnerabilityPublished Updated

CVE-2026-32686: ericmj decimal · Uncontrolled Resource Consumption

Affects ericmj decimalSource CVE Database V5

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Not known to be exploited · CVSS 6.9 Medium : upgrade to 3.0.0 when convenient.

Data as of 30 Oct 2026, 11:52 UTC

CVSS 4.0 base score
6.9Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.4% chance of exploitation in 30 days – higher than 41% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 3.0.0, 6a523f3a73b8c9974540e21c7aa88f1258bb35ae
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 7 May 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 30 Oct 2026.

What to do

Upgrade decimal to 3.0.0; decimal to 6a523f3a73b8c9974540e21c7aa88f1258bb35ae.

Affected software

ProductAffectedFixed in
ericmjdecimalAffected
  • >=0.1.0 <3.0.0
Fixed in
  • 3.0.0
ericmjdecimalAffected
  • ≥ bc11f4a2b6fb61fc1360a0ab4e79141bba918841, < 6a523f3a73b8c9974540e21c7aa88f1258bb35ae
Fixed in
  • 6a523f3a73b8c9974540e21c7aa88f1258bb35ae
Hexdecimalpkg:hex/decimalOther threatsAffected
  • <3.0.0
Fixed in
  • 3.0.0
Hexdecimalpkg:hex/decimalOther threatsAffected
  • >=0.1.0 <3.0.0
Fixed in
  • 3.0.0

CPE configurations (1)

  • cpe:2.3:a:ericmj:decimal:*:*:*:*:*:*:*:*

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

AI-suggested

A patch is available for this vulnerability. Although version 2.4.0 includes mitigations, they are not enabled by default and thus it is not considered a fully patched version. Users should upgrade to a version where the mitigations are enabled by default once such a version is released. Until then, consider implementing input validation to restrict exponent sizes on decimal inputs to prevent exploitation.

Description

Uncontrolled Resource Consumption vulnerability in ericmj decimal allows unauthenticated remote Denial of Service. The decimal library does not bound the exponent on parsed input. Storing a decimal with a very large exponent (e.g. Decimal.new("1e1000000000")) is accepted without error. Subsequent calls to arithmetic functions (Decimal.add/2, Decimal.sub/2, Decimal.div/2M), Decimal.to_string/2M with :normalM or :xsdM format, Decimal.to_integer/1M, Decimal.round/3M, or Decimal.compare/3M with a threshold allocate memory proportional to the exponent value, which can exhaust available memory and crash the BEAM VM. Any application that accepts user-supplied decimal input and subsequently performs arithmetic, rounding, conversion to integer, or string formatting on it is exposed. A single malicious request is sufficient to cause an out-of-memory crash. This issue affects decimal: from 0.1.0 before 3.0.0.

References

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