CVE-2026-33527 json
Parse Server: Session update endpoint allows overwriting server-generated session fields
published 2026-03-24 7 mo ago modified 2026-09-08 2 mo ago also BIT-parse-2026-33527 , EUVD-2026-14974 , GHSA-jc39-686j-wp6q
- cvss
- 4.3
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 18%
- public exploits
- 0
- none known
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.
Patch / fix
- npm parse-server 8.6.57, 9.6.0-alpha.48
- bitnami parse 8.6.57, 9.6.0
- parseplatform parse-server 8.6.57, 9.6.0-alpha.48
- parseplatform parse_server 8.6.57, 9.6.0-alpha.48
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 7 mo ago
Exploit prediction
0.27% chance of exploitation in the next 30 days, higher than 18% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 5.3 | 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 |
| GitHub | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N |
| CNA | 4.0 | 5.3 | 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
| NVD | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| npm | parse-server | >=9.0.0, <9.6.0-alpha.48 <8.6.57 |
9.6.0-alpha.48 8.6.57 |
| bitnami | parse | <8.6.57 >=9.0.0, <9.6.0 |
8.6.57 9.6.0 |
Affected products
- parse-community parse-server
Classification
- Weakness
-
- CWE-863 Incorrect Authorization
References
-
github.com
/parse-community/parse-server/pull/10263
web, issue-tracking, report
-
github.com
/parse-community/parse-server/pull/10264
web, issue-tracking, report
-
github.com
/parse-community/parse-server/commit/26b628c8fb3cc79ea955374769eebcff6f8a8a73
web, patch
-
github.com
/parse-community/parse-server/commit/ea68fc0b22a6056c9675149469ff57817f7cf984
web, patch
-
github.com
/parse-community/parse-server/security/advisories/GHSA-jc39-686j-wp6q
web, vendor-advisory, advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-33527
advisory, web
-
github.com
/parse-community/parse-server
package
Sources
- CVE List CVE-2026-33527
- GitHub Advisory GHSA-jc39-686j-wp6q
- NVD CVE-2026-33527
- OSV BIT-parse-2026-33527
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.