GHSA-JC39-686J-WP6Q

Vulnerability from github – Published: 2026-03-24 16:34 – Updated: 2026-03-30 13:51
VLAI?
Summary
Parse Server's Session Update endpoint allows overwriting server-generated session fields
Details

Impact

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.

Patches

The fix blocks authenticated users from setting expiresAt and createdWith fields when updating a session. Master key and maintenance key operations are not affected.

Workarounds

There is no known workaround other than upgrading.

Resources

  • GitHub security advisory: https://github.com/parse-community/parse-server/security/advisories/GHSA-jc39-686j-wp6q
  • Fix Parse Server 9: https://github.com/parse-community/parse-server/pull/10263
  • Fix Parse Server 8: https://github.com/parse-community/parse-server/pull/10264
Severity ?
4.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
5.3 (Medium)
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
Show details on source website
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{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "parse-server"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "9.0.0"
            },
            {
              "fixed": "9.6.0-alpha.48"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "npm",
        "name": "parse-server"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "8.6.57"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-33527"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-863"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-03-24T16:34:11Z",
    "nvd_published_at": "2026-03-24T19:16:54Z",
    "severity": "MODERATE"
  },
  "details": "### Impact\n\nAn 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\u0027s configured session lifetime policy, making a session effectively permanent.\n\n### Patches\n\nThe fix blocks authenticated users from setting `expiresAt` and `createdWith` fields when updating a session. Master key and maintenance key operations are not affected.\n\n### Workarounds\n\nThere is no known workaround other than upgrading.\n\n### Resources\n\n- GitHub security advisory: https://github.com/parse-community/parse-server/security/advisories/GHSA-jc39-686j-wp6q\n- Fix Parse Server 9: https://github.com/parse-community/parse-server/pull/10263\n- Fix Parse Server 8: https://github.com/parse-community/parse-server/pull/10264",
  "id": "GHSA-jc39-686j-wp6q",
  "modified": "2026-03-30T13:51:45Z",
  "published": "2026-03-24T16:34:11Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/parse-community/parse-server/security/advisories/GHSA-jc39-686j-wp6q"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-33527"
    },
    {
      "type": "WEB",
      "url": "https://github.com/parse-community/parse-server/pull/10263"
    },
    {
      "type": "WEB",
      "url": "https://github.com/parse-community/parse-server/pull/10264"
    },
    {
      "type": "WEB",
      "url": "https://github.com/parse-community/parse-server/commit/26b628c8fb3cc79ea955374769eebcff6f8a8a73"
    },
    {
      "type": "WEB",
      "url": "https://github.com/parse-community/parse-server/commit/ea68fc0b22a6056c9675149469ff57817f7cf984"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/parse-community/parse-server"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N",
      "type": "CVSS_V3"
    },
    {
      "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",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Parse Server\u0027s Session Update endpoint allows overwriting server-generated session fields"
}


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