CVE-2026-49762

MediumCVSS 5.1

Published: 09/06/2026(UTC)Updated: 23/07/2026(UTC)Translated: 25/07/2026(UTC)NVD NIST

Exploitation Probability (EPSS)

Low risk

0.15%

5th percentile - higher than 5% of all known CVEs

Summary

The Elixir standard library's Version module contains an uncontrolled resource consumption vulnerability. An attacker controlling a version string can cause a denial of service through CPU and memory exhaustion. This affects Elixir versions from 1.5.0 before 1.20.1.

Risk Assessment

The risk involves the possibility of an easy DoS attack on applications using version parsing, which could disrupt critical services for the organization.

Recommendation

It is recommended to update Elixir to version 1.20.1 or later, which includes a fix for this vulnerability.

Other vulnerabilities in Elixir

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 1.5.0 before 1.20.1.