Medium
Parse Server: Session update endpoint allows overwriting server-generated session fields
Type: advisorySources: OSV
Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.57 and 9.6.0-alpha.48, an authenticated user can overwrite server-generated session fields such as expiresAt and createdWith when updating their own session via the REST API. This allows bypassing the server's configured session lifetime policy, making a session effectively permanent. This issue has been patched in versions 8.6.57 and 9.6.0-alpha.48.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-33527
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 3 Nov 2026, 08:16 UTC · Revision 1
Source evidence
Parse Server: Session update endpoint allows overwriting server-generated session fields
core-osv · Original sourcePublished 24 Mar 2026, 18:22 UTC
Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.57 and 9.6.0-alpha.48, an authenticated user can overwrite server-generated session fields such as expiresAt and createdWith when updating their own session via the REST API. This allows bypassing the server's configured session lifetime policy, making a session effectively permanent. This issue has been patched in versions 8.6.57 and 9.6.0-alpha.48.
osv:CVE-2026-33527
Complete source record
{
"id": "b15a8283c99777b468a82d03cca1ce50235d781d550acc081c1163bb2a2be8b5",
"url": "https://osv.dev/vulnerability/CVE-2026-33527",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Parse Server: Session update endpoint allows overwriting server-generated session fields",
"summary": "Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.57 and 9.6.0-alpha.48, an authenticated user can overwrite server-generated session fields such as expiresAt and createdWith when updating their own session via the REST API. This allows bypassing the server's configured session lifetime policy, making a session effectively permanent. This issue has been patched in versions 8.6.57 and 9.6.0-alpha.48.",
"evidence": "osv:CVE-2026-33527",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2026-33527",
"aliases": [
"BIT-parse-2026-33527",
"CVE-2026-33527",
"GHSA-jc39-686j-wp6q"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N"
}
],
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"modified": "2026-10-28T02:30:27.114108952Z",
"provider": "osv",
"references": [
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"https://github.com/parse-community/parse-server/security/advisories/GHSA-jc39-686j-wp6q",
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"source_id": "core-osv",
"document_id": 493713,
"published_at": "2026-03-24T18:22:44.613+00:00"
}