GHSA-F6J3-W9V3-CQ22
Vulnerability from github – Published: 2026-04-01 00:03 – Updated: 2026-04-01 00:03
VLAI?
Summary
Parse Server has a session field immutability bypass via falsy-value guard
Details
Impact
An authenticated user can bypass the immutability guard on session fields (expiresAt, createdWith) by sending a null value in a PUT request to the session update endpoint. This allows nullifying the session expiry, making the session valid indefinitely and bypassing configured session length policies.
Patches
The truthiness-based guard checks were replaced with key-presence checks that reject any value for protected session fields, including null.
Workarounds
There is no known workaround. A beforeSave trigger on _Session could be used to reject null values for expiresAt and createdWith.
Severity ?
{
"affected": [
{
"package": {
"ecosystem": "npm",
"name": "parse-server"
},
"ranges": [
{
"events": [
{
"introduced": "9.0.0"
},
{
"fixed": "9.7.0-alpha.14"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "npm",
"name": "parse-server"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "8.6.69"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2026-34574"
],
"database_specific": {
"cwe_ids": [
"CWE-697"
],
"github_reviewed": true,
"github_reviewed_at": "2026-04-01T00:03:19Z",
"nvd_published_at": "2026-03-31T16:16:33Z",
"severity": "MODERATE"
},
"details": "### Impact\n\nAn authenticated user can bypass the immutability guard on session fields (`expiresAt`, `createdWith`) by sending a null value in a PUT request to the session update endpoint. This allows nullifying the session expiry, making the session valid indefinitely and bypassing configured session length policies.\n\n### Patches\n\nThe truthiness-based guard checks were replaced with key-presence checks that reject any value for protected session fields, including null.\n\n### Workarounds\n\nThere is no known workaround. A `beforeSave` trigger on `_Session` could be used to reject null values for `expiresAt` and `createdWith`.",
"id": "GHSA-f6j3-w9v3-cq22",
"modified": "2026-04-01T00:03:19Z",
"published": "2026-04-01T00:03:19Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/parse-community/parse-server/security/advisories/GHSA-f6j3-w9v3-cq22"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-34574"
},
{
"type": "WEB",
"url": "https://github.com/parse-community/parse-server/pull/10347"
},
{
"type": "WEB",
"url": "https://github.com/parse-community/parse-server/pull/10348"
},
{
"type": "WEB",
"url": "https://github.com/parse-community/parse-server/commit/90802969fc713b7bc9733d7255c7519a6ed75d21"
},
{
"type": "WEB",
"url": "https://github.com/parse-community/parse-server/commit/ebccd7fe2708007e62f705ee1c820a6766178777"
},
{
"type": "PACKAGE",
"url": "https://github.com/parse-community/parse-server"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "Parse Server has a session field immutability bypass via falsy-value guard"
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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