CVE-2026-32686
Uncontrolled Resource Consumption vulnerability in ericmj decimal allows unauthenticated remote Denial of Service.
Does this matter?
Lower severity and a low EPSS score (0.32%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 4.0
- 6.9 MEDIUMCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M
- EPSS
- 0.32% probability · 25th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-400
- Source
- 6b3ad84c-e1a6-4bf7-a703-f496b71e49db
References
- https://cna.erlef.org/cves/CVE-2026-32686.html
- https://github.com/ericmj/decimal/commit/6a523f3a73b8c9974540e21c7aa88f1258bb35ae
- https://github.com/ericmj/decimal/commit/bc11f4a2b6fb61fc1360a0ab4e79141bba918841
- https://github.com/ericmj/decimal/security/advisories/GHSA-rhv4-8758-jx7v
- https://osv.dev/vulnerability/EEF-CVE-2026-32686
- https://github.com/ericmj/decimal/security/advisories/GHSA-rhv4-8758-jx7v
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.