{"id":"CVE-2026-49762","state":"PUBLISHED","title":"Unbounded integer parsing in the Version module enables CPU and memory exhaustion denial of service","description":"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.\n\nThe 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.\n\nThis 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.\n\nThis vulnerability is associated with program files lib/version.ex and program routines 'Elixir.Version.Parser':parse_digits/2.\n\nThis issue affects elixir: from 0.9.3 before 1.20.1.","publishedAt":"2026-06-09T14:04:07.405Z","updatedAt":"2026-10-06T08:35:59.691Z","severity":{"score":5.1,"label":"Medium","version":"4.0","vector":"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","source":"EEF"},"assigner":"EEF","products":["elixir-lang elixir"],"affected":[{"vendor":"elixir-lang","product":"elixir","packageName":"elixir","packageURL":"pkg:otp/elixir?repository_url=https:%2F%2Fgithub.com%2Felixir-lang%2Felixir&vcs_url=git%2Bhttps:%2F%2Fgithub.com%2Felixir-lang%2Felixir.git","defaultStatus":"unaffected","versions":[{"version":"0.9.3","status":"affected","lessThan":"1.20.1","versionType":"semver"}],"cpes":["cpe:2.3:a:elixir-lang:elixir:*:*:*:*:*:*:*:*"],"modules":["'Elixir.Version'","'Elixir.Version.Parser'"],"programFiles":["lib/version.ex"],"programRoutines":[{"name":"'Elixir.Version':parse/1"},{"name":"'Elixir.Version':parse!/1"},{"name":"'Elixir.Version':match?/3"},{"name":"'Elixir.Version':compare/2"},{"name":"'Elixir.Version':parse_requirement/1"},{"name":"'Elixir.Version.Parser':parse_version/2"},{"name":"'Elixir.Version.Parser':parse_digits/2"},{"name":"'Elixir.Version.Parser':require_digits/1"},{"name":"'Elixir.Version.Parser':convert_parts_to_integer/2"}],"repo":"https://github.com/elixir-lang/elixir"},{"vendor":"elixir-lang","product":"elixir","packageName":"elixir-lang/elixir","packageURL":"pkg:github/elixir-lang/elixir","defaultStatus":"unaffected","versions":[{"version":"057691722eb8cfe315f5606358954a2b173ff7a3","status":"affected","lessThan":"*","changes":[{"at":"c64417d72fd5c7d09e963ca3ac5fa2b140978d9e","status":"unaffected"},{"at":"64e6707233464c3e55a9ca6b44019aed25b0390a","status":"unaffected"}],"versionType":"git"}],"collectionURL":"https://github.com","cpes":["cpe:2.3:a:elixir-lang:elixir:*:*:*:*:*:*:*:*"],"modules":["'Elixir.Version'","'Elixir.Version.Parser'"],"programFiles":["lib/elixir/lib/version.ex"],"programRoutines":[{"name":"'Elixir.Version':parse/1"},{"name":"'Elixir.Version':parse!/1"},{"name":"'Elixir.Version':match?/3"},{"name":"'Elixir.Version':compare/2"},{"name":"'Elixir.Version':parse_requirement/1"},{"name":"'Elixir.Version.Parser':parse_version/2"},{"name":"'Elixir.Version.Parser':parse_digits/2"},{"name":"'Elixir.Version.Parser':require_digits/1"},{"name":"'Elixir.Version.Parser':convert_parts_to_integer/2"}],"repo":"https://github.com/elixir-lang/elixir"}],"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"],"weaknesses":["CWE-400"],"ingestedAt":"2026-10-29T20:12:07.131Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/49xxx/CVE-2026-49762.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-49762","state":"PUBLISHED","datePublished":"2026-06-09T14:04:07.405Z","dateUpdated":"2026-10-06T08:35:59.691Z","assignerShortName":"EEF","assignerOrgId":"6b3ad84c-e1a6-4bf7-a703-f496b71e49db","dateReserved":"2026-06-01T13:45:22.449Z"},"containers":{"cna":{"title":"Unbounded integer parsing in the Version module enables CPU and memory exhaustion denial of service","descriptions":[{"lang":"en","value":"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.\n\nThe 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.\n\nThis 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.\n\nThis vulnerability is associated with program files lib/version.ex and program routines 'Elixir.Version.Parser':parse_digits/2.\n\nThis issue affects elixir: from 0.9.3 before 1.20.1."}],"affected":[{"vendor":"elixir-lang","product":"elixir","packageName":"elixir","packageURL":"pkg:otp/elixir?repository_url=https:%2F%2Fgithub.com%2Felixir-lang%2Felixir&vcs_url=git%2Bhttps:%2F%2Fgithub.com%2Felixir-lang%2Felixir.git","defaultStatus":"unaffected","versions":[{"version":"0.9.3","status":"affected","lessThan":"1.20.1","versionType":"semver"}],"cpes":["cpe:2.3:a:elixir-lang:elixir:*:*:*:*:*:*:*:*"],"modules":["'Elixir.Version'","'Elixir.Version.Parser'"],"programFiles":["lib/version.ex"],"programRoutines":[{"name":"'Elixir.Version':parse/1"},{"name":"'Elixir.Version':parse!/1"},{"name":"'Elixir.Version':match?/3"},{"name":"'Elixir.Version':compare/2"},{"name":"'Elixir.Version':parse_requirement/1"},{"name":"'Elixir.Version.Parser':parse_version/2"},{"name":"'Elixir.Version.Parser':parse_digits/2"},{"name":"'Elixir.Version.Parser':require_digits/1"},{"name":"'Elixir.Version.Parser':convert_parts_to_integer/2"}],"repo":"https://github.com/elixir-lang/elixir"},{"vendor":"elixir-lang","product":"elixir","packageName":"elixir-lang/elixir","packageURL":"pkg:github/elixir-lang/elixir","defaultStatus":"unaffected","versions":[{"version":"057691722eb8cfe315f5606358954a2b173ff7a3","status":"affected","lessThan":"*","changes":[{"at":"c64417d72fd5c7d09e963ca3ac5fa2b140978d9e","status":"unaffected"},{"at":"64e6707233464c3e55a9ca6b44019aed25b0390a","status":"unaffected"}],"versionType":"git"}],"collectionURL":"https://github.com","cpes":["cpe:2.3:a:elixir-lang:elixir:*:*:*:*:*:*:*:*"],"modules":["'Elixir.Version'","'Elixir.Version.Parser'"],"programFiles":["lib/elixir/lib/version.ex"],"programRoutines":[{"name":"'Elixir.Version':parse/1"},{"name":"'Elixir.Version':parse!/1"},{"name":"'Elixir.Version':match?/3"},{"name":"'Elixir.Version':compare/2"},{"name":"'Elixir.Version':parse_requirement/1"},{"name":"'Elixir.Version.Parser':parse_version/2"},{"name":"'Elixir.Version.Parser':parse_digits/2"},{"name":"'Elixir.Version.Parser':require_digits/1"},{"name":"'Elixir.Version.Parser':convert_parts_to_integer/2"}],"repo":"https://github.com/elixir-lang/elixir"}],"references":[{"url":"https://github.com/elixir-lang/elixir/security/advisories/GHSA-w2h8-8x3g-278p","name":"GitHub 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elixir-lang/elixir","tags":["patch"]}],"metrics":[{"cvssV4_0":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"LOCAL","baseScore":5.1,"baseSeverity":"MEDIUM","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"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","version":"4.0","vulnAvailabilityImpact":"LOW","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnerabilityResponseEffort":"NOT_DEFINED"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-400","description":"CWE-400 Uncontrolled Resource Consumption","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"EEF","orgId":"6b3ad84c-e1a6-4bf7-a703-f496b71e49db","dateUpdated":"2026-10-06T08:35:59.691Z"},"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:a:elixir-lang:elixir:*:*:*:*:*:*:*:*","versionEndExcluding":"1.20.1","versionStartIncluding":"0.9.3","vulnerable":true}],"negate":false,"operator":"OR"}],"operator":"AND"}],"credits":[{"lang":"en","type":"finder","value":"Peter Ullrich"},{"lang":"en","type":"remediation developer","value":"José Valim"},{"lang":"en","type":"remediation reviewer","value":"Eric Meadows-Jönsson"},{"lang":"en","type":"analyst","value":"Jonatan Männchen / EEF"}],"datePublic":"2026-06-09T14:04:07.000Z","impacts":[{"capecId":"CAPEC-130","descriptions":[{"lang":"en","value":"CAPEC-130 Excessive Allocation"}]}],"source":{"discovery":"EXTERNAL"}},"adp":[{"title":"CISA ADP 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