High
pnpm: manifest identity spoof satisfies allowBuilds and runs attacker lifecycle
Type: advisorySources: OSV
pnpm is a package manager. Prior to 10.34.2 and 11.5.3, the generic peer-suffix normalizer also stripped parenthesized text from git, URL, tarball, file, and other opaque locators. Approval for one source string could therefore authorize a different attacker-controlled source whose locator normalized to the same value. This vulnerability is fixed in 10.34.2 and 11.5.3.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-55487
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 2 Nov 2026, 20:41 UTC · Revision 1
Source evidence
pnpm: manifest identity spoof satisfies allowBuilds and runs attacker lifecycle
core-osv · Original sourcePublished 25 Jun 2026, 16:41 UTC
pnpm is a package manager. Prior to 10.34.2 and 11.5.3, the generic peer-suffix normalizer also stripped parenthesized text from git, URL, tarball, file, and other opaque locators. Approval for one source string could therefore authorize a different attacker-controlled source whose locator normalized to the same value. This vulnerability is fixed in 10.34.2 and 11.5.3.
osv:CVE-2026-55487
Complete source record
{
"id": "a425963cfe79e42e552fd2b65d776a85c0a4c5e386afcf0ffc6ce3871268dc60",
"url": "https://osv.dev/vulnerability/CVE-2026-55487",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "pnpm: manifest identity spoof satisfies allowBuilds and runs attacker lifecycle",
"summary": "pnpm is a package manager. Prior to 10.34.2 and 11.5.3, the generic peer-suffix normalizer also stripped parenthesized text from git, URL, tarball, file, and other opaque locators. Approval for one source string could therefore authorize a different attacker-controlled source whose locator normalized to the same value. This vulnerability is fixed in 10.34.2 and 11.5.3.",
"evidence": "osv:CVE-2026-55487",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2026-55487",
"aliases": [
"CVE-2026-55487",
"GHSA-5wx6-mg75-v57r"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/pnpm/pnpm",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "343441ca6257688fea9c5c4edc4feccf7f97c43b"
},
{
"introduced": "8aeeff4c46b939707fcb973c444c44809f691ef5"
},
{
"fixed": "b7195db5c8469c80908d625c648302b26c2f9977"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:pnpm:pnpm:*:*:*:*:*:node.js:*:*",
"range": [
{
"introduced": "0"
},
{
"fixed": "10.34.2"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:pnpm:pnpm:*:*:*:*:*:node.js:*:*",
"range": [
{
"introduced": "11.0.0"
},
{
"fixed": "11.5.3"
}
],
"source": "CPE_RANGE"
}
]
}
}
],
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"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55487.json"
}
}
],
"modified": "2026-10-28T02:30:23.605660921Z",
"provider": "osv",
"references": [
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55487.json",
"https://github.com/pnpm/pnpm/security/advisories/GHSA-5wx6-mg75-v57r",
"https://nvd.nist.gov/vuln/detail/CVE-2026-55487"
],
"provider_metadata": {
"cwe_ids": [
"CWE-346",
"CWE-693",
"CWE-829"
],
"cna_assigner": "GitHub_M",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55487.json"
}
},
"related_cves": [
{
"value": "CVE-2026-55487",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 489976,
"published_at": "2026-06-25T16:41:12.441+00:00"
}