---
id: CVE-2026-49762
title: >-
  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…
summary: >-
  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…
severity: medium
cvss: 5.1
cvssVector: 'CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N'
cwe:
  - CWE-400
vendor: elixir-lang
product: elixir
affected:
  - elixir >= 0.9.3 < 1.20.1
  - elixir-lang/elixir >= 057691722eb8cfe315f5606358954a2b173ff7a3 < *
published: '2026-06-09'
updated: '2026-10-06'
sourceUpdated: '2026-10-06T09:17:56.080'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-49762'
references:
  - url: 'https://cna.erlef.org/cves/CVE-2026-49762.html'
    label: 6b3ad84c-e1a6-4bf7-a703-f496b71e49db
  - url: >-
      https://github.com/elixir-lang/elixir/commit/057691722eb8cfe315f5606358954a2b173ff7a3
    label: 6b3ad84c-e1a6-4bf7-a703-f496b71e49db
  - url: >-
      https://github.com/elixir-lang/elixir/commit/64e6707233464c3e55a9ca6b44019aed25b0390a
    label: 6b3ad84c-e1a6-4bf7-a703-f496b71e49db
  - url: >-
      https://github.com/elixir-lang/elixir/commit/c64417d72fd5c7d09e963ca3ac5fa2b140978d9e
    label: 6b3ad84c-e1a6-4bf7-a703-f496b71e49db
  - url: >-
      https://github.com/elixir-lang/elixir/security/advisories/GHSA-w2h8-8x3g-278p
    label: 6b3ad84c-e1a6-4bf7-a703-f496b71e49db
  - url: 'https://osv.dev/vulnerability/EEF-CVE-2026-49762'
    label: 6b3ad84c-e1a6-4bf7-a703-f496b71e49db
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-06-09T14:48:56.343391Z'
cvssSource: cna
epss: 0.00219
epssPercentile: 0.11254
ingestedAt: '2026-10-06T08:50:17.461Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.