CVE-2026-49762
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.
- Score
- CVSS 4.0 5.1 Medium
- Status
- Deferred - 6b3ad84c-e1a6-4bf7-a703-f496b71e49db
- Published
- 2026-06-09
- Last modified
- 2026-10-06
- Weaknesses
- CWE-400
Affected products
References
- https://github.com/elixir-lang/elixir/security/advisories/GHSA-w2h8-8x3g-278p
- https://cna.erlef.org/cves/CVE-2026-49762.html
- https://osv.dev/vulnerability/EEF-CVE-2026-49762
- https://github.com/elixir-lang/elixir/commit/057691722eb8cfe315f5606358954a2b173ff7a3
- https://github.com/elixir-lang/elixir/commit/c64417d72fd5c7d09e963ca3ac5fa2b140978d9e
- https://github.com/elixir-lang/elixir/commit/64e6707233464c3e55a9ca6b44019aed25b0390a
