{"id":"GHSA-2mhw-wcx5-v3xj","revision":null,"records":[{"revision":"f93a67777f184af09caadee094a88fe4","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-61834","aliases":[],"title":"scim-patch: Mutation of Inherited Built-in Method Objects","description":"scim-patch is a library for applying SCIM patch operations. Prior to 0.9.2, navigate() reads inherited properties and assign() uses prototype-chain membership checks while resolving attacker-controlled SCIM PATCH paths. A path or one of the dotted value keys beginning with an inherited property such as toString can therefore traverse into a shared built-in function object and add attacker-controlled properties, causing process-global mutation that may affect application logic reading inherited-method properties. This issue is fixed in version 0.9.2.","state":0,"publishedAt":"2026-09-23T14:02:01.131+00:00","modifiedAt":"2026-09-23T16:20:22.098+00:00","affected":[{"ecosystem":"Vendor product","name":"scim-patch","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"thomaspoignant\",\n                    \"product\": \"scim-patch\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 0.9.2\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","score":4.3,"severity":"MEDIUM"}],"references":["https://github.com/thomaspoignant/scim-patch/security/advisories/GHSA-2mhw-wcx5-v3xj","https://github.com/thomaspoignant/scim-patch/pull/1127","https://github.com/thomaspoignant/scim-patch/commit/c86474f7a9b16191d939f59ba94eca6c6e63044b","https://github.com/thomaspoignant/scim-patch/releases/tag/v0.9.2"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-61834","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-61834","identifiers":["CVE-2026-61834"]},"retained":false,"historicalAffected":[]},{"revision":"fe94bd531ab1475ab440660216a1fee2","observedAt":"2026-11-11T15:03:26.501+00:00","statement":{"source":"euvd","id":"EUVD-2026-85327","aliases":["CVE-2026-61834","GHSA-2mhw-wcx5-v3xj"],"title":"scim-patch is a library for applying SCIM patch operations. Prior to 0.9.2, navigate() reads inherited properties and assign() uses prototype-chain membership checks while resolving attacker-controlled SCIM PATCH paths. A path or one of the…","description":"scim-patch is a library for applying SCIM patch operations. Prior to 0.9.2, navigate() reads inherited properties and assign() uses prototype-chain membership checks while resolving attacker-controlled SCIM PATCH paths. A path or one of the dotted value keys beginning with an inherited property such as toString can therefore traverse into a shared built-in function object and add attacker-controlled properties, causing process-global mutation that may affect application logic reading inherited-method properties. This issue is fixed in version 0.9.2.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","score":4.3,"severity":null}],"references":["https://github.com/thomaspoignant/scim-patch/security/advisories/GHSA-2mhw-wcx5-v3xj","https://github.com/thomaspoignant/scim-patch/pull/1127","https://github.com/thomaspoignant/scim-patch/commit/c86474f7a9b16191d939f59ba94eca6c6e63044b","https://github.com/thomaspoignant/scim-patch/releases/tag/v0.9.2"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-85327","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Sep 23, 2026, 2:02:01 PM","dateUpdated":"Sep 23, 2026, 4:20:22 PM"},"relatedAdvisories":[],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. 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Prior to 0.9.2, navigate() reads inherited properties and assign() uses prototype-chain membership checks while resolving attacker-controlled SCIM PATCH paths. A path or one of the dotted value keys beginning with an inherited property such as toString can therefore traverse into a shared built-in function object and add attacker-controlled properties, causing process-global mutation that may affect application logic reading inherited-method properties. This issue is fixed in version 0.9.2.","state":0,"publishedAt":"2026-09-23T15:17:15.127+00:00","modifiedAt":"2026-09-23T17:17:15.923+00:00","affected":[],"metrics":[{"system":"CVSS 3.1 · security-advisories@github.com · Secondary","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","score":4.3,"severity":"MEDIUM"}],"references":["https://github.com/thomaspoignant/scim-patch/commit/c86474f7a9b16191d939f59ba94eca6c6e63044b","https://github.com/thomaspoignant/scim-patch/pull/1127","https://github.com/thomaspoignant/scim-patch/releases/tag/v0.9.2","https://github.com/thomaspoignant/scim-patch/security/advisories/GHSA-2mhw-wcx5-v3xj"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-61834","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Deferred","weaknesses":["CWE-915","CWE-1321"],"productCriteria":[],"sourceDates":{"published":"2026-09-23T15:17:15.127","lastModified":"2026-09-23T17:17:15.923"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-61834","identifiers":["CVE-2026-61834"]},"retained":false,"historicalAffected":[]},{"revision":"ba98c45fa17f4b6c9519f51bbd68d897","observedAt":"2026-10-24T13:17:17.793+00:00","statement":{"source":"osv","id":"GHSA-2mhw-wcx5-v3xj","aliases":["CVE-2026-61834"],"title":"scim-patch: Mutation of Inherited Built-in Method Objects","description":"## Summary\n\nIncomplete Prototype Pollution Fix Allows Mutation of Inherited Built-in Method Objects\n\n`scim-patch` blocks direct dangerous path segments such as `__proto__`, `constructor`, and `prototype`, but still traverses inherited properties when applying SCIM patch paths.\n\nAn attacker who controls a SCIM PATCH operation can use paths such as `toString.polluted` to mutate shared built-in function objects, for example `Object.prototype.toString`.\n\n## Impact\n\nA malicious patch can add attacker-controlled properties to inherited built-in method objects. The impact is narrower than direct `Object.prototype` pollution, but the mutation is process-global and may affect application logic that reads properties from inherited methods.\n\n## Details\n\nAffected code paths:\n\n- `navigate()` reads inherited properties via `schema[subPath]`\n- `assign()` uses `key in obj`, which treats inherited properties as existing\n\nBecause inherited keys are followed, safe-looking path segments such as `toString` can resolve to shared built-in objects.\n\n## PoC\n\n```js\nconst assert = require(\"node:assert/strict\");\nconst { scimPatch } = require(\"./lib/src/scimPatch\");\n\nconst victim = {\n  schemas: [\"urn:ietf:params:scim:schemas:core:2.0:User\"],\n  userName: \"alice\",\n  active: true,\n  emails: [{ value: \"alice@example.com\", primary: true }],\n  meta: { created: \"x\", lastModified: \"x\", resourceType: \"User\" }\n};\n\ntry {\n  assert.equal(({}).toString.scimPatchPolluted, undefined);\n\n  scimPatch(victim, [\n    { op: \"add\", path: \"toString.scimPatchPolluted\", value: \"polluted\" }\n  ]);\n\n  assert.equal(({}).toString.scimPatchPolluted, \"polluted\");\n  console.log(({}).toString.scimPatchPolluted);\n} finally {\n  delete Object.prototype.toString.scimPatchPolluted;\n}\n```\n\nOutput:\n\n```text\npolluted\n```\n\nA no-path operation with a dotted value key is also affected:\n\n```js\nscimPatch(victim, [\n  { op: \"add\", value: { \"toString.noPathPolluted\": \"polluted\" } }\n]);\n```\n\n## Remediation\n\nDo not traverse inherited properties while resolving patch paths. Use own-property checks such as `Object.hasOwn(obj, key)` and create missing containers only for safe own keys.\n\nKeep the existing denylist for `__proto__`, `constructor`, and `prototype` as defense in depth.","state":0,"publishedAt":"2026-09-28T14:01:15+00:00","modifiedAt":"2026-09-28T14:15:04.388936+00:00","affected":[{"ecosystem":"npm","name":"scim-patch","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"0.9.2"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"MODERATE"}],"references":["https://github.com/thomaspoignant/scim-patch/security/advisories/GHSA-2mhw-wcx5-v3xj","https://nvd.nist.gov/vuln/detail/CVE-2026-61834","https://github.com/thomaspoignant/scim-patch/pull/1127","https://github.com/thomaspoignant/scim-patch/commit/c86474f7a9b16191d939f59ba94eca6c6e63044b","https://github.com/thomaspoignant/scim-patch","https://github.com/thomaspoignant/scim-patch/releases/tag/v0.9.2"],"sourceUrl":"https://github.com/advisories/GHSA-2mhw-wcx5-v3xj","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-2mhw-wcx5-v3xj","identifiers":["GHSA-2mhw-wcx5-v3xj","CVE-2026-61834"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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