Answer in brief
CVE-2026-115274 records a Medium severity (CVSS 6.9) vulnerability in Unbounded integer parsing in JSON.decode/1 enables CPU and memory exhaustion denial of service in Elixir. The current sources do not mark it as known exploited. The current feed maps elixir-lang/elixir (generic), elixir-lang/elixir-lang/elixir (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 6.9. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps elixir-lang/elixir (generic), elixir-lang/elixir-lang/elixir (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| elixir-lang/elixirgeneric | >=1.18.0-rc.0 <1.18.6 || >=1.19.0-rc.0 <1.19.7 || >=1.20.0-rc.0 <1.20.5 | 1.18.6, 1.19.7, 1.20.5 |
| elixir-lang/elixir-lang/elixirgeneric | >=793c1147210388587defb649f25f293ffbfa6b1b <* | * |
Published upstream
Oct 30, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 30, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 30, 2026
Improper Validation of Specified Quantity in Input vulnerability in the Elixir standard library's JSON module allows an unauthenticated attacker who supplies a JSON document to cause a denial of service through CPU and memory exhaustion. JSON.decode/1 and JSON.decode!/1 convert each integer literal with erlang:binary_to_integer/1 and do not bound its length. A literal of one million digits decodes successfully but costs 100 to 300 times as much CPU as a string of the same length, so one request body of a few megabytes holds a scheduler for about a second. A literal of more than about 1.29 million digits raises SystemLimitError. Applications generated by phx.new decode request bodies with JSON in Plug.Parsers, before routing and authentication. This issue affects elixir: from 1.18.0-rc.0 before 1.18.6, from 1.19.0-rc.0 before 1.19.7, and from 1.20.0-rc.0 before 1.20.5.
Quoted source text, attributed separately from HOL analysis.