CVE-2026-49762
MediumCVSS 5.1Exploitation Probability (EPSS)
Low risk11th percentile - higher than 11% of all known CVEs
Summary
The Version module in the Elixir standard library (versions from 0.9.3 before 1.20.1) is vulnerable to uncontrolled resource consumption. An attacker controlling a version string can cause a denial of service through CPU and memory exhaustion. The version parser converts numeric components to integers without bounding their length, leading to super-linear conversion and process crashes.
Risk Assessment
A remote attacker can send a specially crafted version string, causing system overload and application downtime, leading to service unavailability.
Recommendation
Upgrade Elixir to version 1.20.1 or later, which includes the fix.
Other vulnerabilities in Elixir
See all- CVE-2026-115274Medium
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.
- CVE-2026-109821Medium
Improper Validation of Specified Quantity in Input vulnerability in the Elixir standard library's URI module allows an attacker who supplies a URL to cause a denial of service through CPU exhaustion. URI.parse/1 converts the port component with String.to_integer/1 in split_authority/1 without bounding its length.
- CVE-2026-75758Medium
Uncontrolled recursion in the Elixir standard library allows an attacker who controls a list passed to inspect/1, List.to_string/1, or List.to_charlist/1 to exhaust a BEAM node's memory. The issue stems from misclassification of a list as a charlist, leading to recursive exception raising and stack growth until memory exhaustion.
Original NVD description (English source)
Uncontrolled Resource Consumption vulnerability in the Elixir standard library's Version module allows an attacker who controls a version string to cause a denial of service through CPU and memory exhaustion. The version parser converts numeric version components (major, minor, patch and numeric pre-release/build identifiers) to integers without bounding their length. A single large all-digit component therefore forces a super-linear, non-yielding base-10 to arbitrary-precision integer conversion (String.to_integer/1, i.e. :erlang.binary_to_integer/1) that pins a BEAM scheduler, and a larger component raises an uncaught SystemLimitError that crashes the calling process. A single moderately sized string (around one megabyte) is enough; no authentication is required. This is reachable from the public entry points Version.parse/1, Version.parse!/1, Version.match?/3, Version.compare/2, and Version.parse_requirement/1, which applications routinely call on untrusted input such as HTTP parameters, dependency-manifest fields, and package metadata. This vulnerability is associated with program files lib/version.ex and program routines 'Elixir.Version.Parser':parse_digits/2. This issue affects elixir: from 0.9.3 before 1.20.1.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS