elixir-lang — security advisory
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.
- Products
- elixir-lang
- Affected versions
- 1.14.0.dfsg-2, 1.17.3.dfsg-1, 1.17.3.dfsg-2, 1.18.1.dfsg-1, 1.18.1.dfsg-1.1, 1.18.3.dfsg-1, 1.18.3.dfsg-2, 1.19.5.dfsg-1, 1.19.5.dfsg-2, 1.20.0.dfsg-1, 1.20.1.dfsg-1, 1.20.1.dfsg-2, 1.20.4+dfsg-1
- Fixed versions
- 1.20.1.dfsg-1
- CVEs
- CVE-2026-49762
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 28 Oct 2026, 03:39 UTC · Revision 1
Source evidence
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.
osv:DEBIAN-CVE-2026-49762
elixir-lang
Fixed versions: Not specified
elixir-lang
Fixed versions: Not specified
elixir-lang
Fixed versions: 1.20.1.dfsg-1
Complete source record
{
"id": "d729c7afc68d7a99ddfd7b7ab62cc31ddcc2b52332e92dca110858ee35548adb",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-49762",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2026-49762",
"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 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.",
"evidence": "osv:DEBIAN-CVE-2026-49762",
"products": [
{
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"evidence": "/affected/0/versions"
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{
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{
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"evidence": "/affected/0/versions"
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{
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{
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"evidence": "/affected/0/versions"
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{
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"evidence": "/affected/0/versions"
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{
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"evidence": "/affected/0/versions"
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{
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"evidence": "/affected/0/versions"
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"evidence": "/affected/1/versions"
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{
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{
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"affected_versions": [
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"evidence": "/affected/2/versions"
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{
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"evidence": "/affected/2/versions"
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{
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"evidence": "/affected/2/versions"
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{
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{
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],
"severity": "medium",
"structured": {
"id": "DEBIAN-CVE-2026-49762",
"aliases": [
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],
"metrics": [
{
"type": "CVSS_V4",
"score": "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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"
}
],
"affected": [
{
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{
"type": "ECOSYSTEM",
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"package": {
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"purl": "pkg:deb/debian/elixir-lang?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"1.14.0.dfsg-2",
"1.17.3.dfsg-1",
"1.17.3.dfsg-2",
"1.18.1.dfsg-1",
"1.18.1.dfsg-1.1",
"1.18.3.dfsg-1",
"1.18.3.dfsg-2",
"1.19.5.dfsg-1",
"1.19.5.dfsg-2",
"1.20.0.dfsg-1",
"1.20.1.dfsg-1",
"1.20.1.dfsg-2",
"1.20.4+dfsg-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-49762.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
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},
{
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"purl": "pkg:deb/debian/elixir-lang?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
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"1.18.3.dfsg-2",
"1.19.5.dfsg-1",
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"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-49762.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
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},
{
"fixed": "1.20.1.dfsg-1"
}
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],
"package": {
"name": "elixir-lang",
"purl": "pkg:deb/debian/elixir-lang?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"1.18.3.dfsg-1",
"1.18.3.dfsg-2",
"1.19.5.dfsg-1",
"1.19.5.dfsg-2",
"1.20.0.dfsg-1"
],
"database_specific": {
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},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-07T09:47:26.591548859Z",
"provider": "osv",
"upstream": [
"CVE-2026-49762"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2026-49762"
]
},
"related_cves": [
{
"value": "CVE-2026-49762",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 94634,
"published_at": "2026-06-09T14:16:44.317+00:00"
}