CVE-2026-57481Published

Parse Server: LiveQuery discloses object data to a subscriber across an ACL read-access change

Collected exploitation and prediction evidence

CISA KEV is observed exploitation evidence. FIRST EPSS is a dated prediction of exploitation in the next 30 days. Missing scores are unknown. This collector requests predictions only for explicit CVE aliases in the public NuGet archive; Microsoft release views retain their existing prediction scope.

No collected risk observation for these identifiers. This does not establish absence of exploitation or a zero probability.

cve-program · CVE-2026-57481

Published

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to 9.9.1-alpha.13 and 8.6.83, a LiveQuery subscriber could receive object field values they were not authorized to read when a single save changed both an object field and the subscriber's ACL read access, because leave and enter events included the wrong object state. This issue is fixed in versions 9.9.1-alpha.13 and 8.6.83.

Source published: 8 Jul 2026 20:54:55 UTC
Source modified: 10 Jul 2026 14:14:39 UTC
Observed here: 23 Oct 2026 15:48:27 UTC
Source terms: CVE Program Terms of Use

Original source record · Cite this exact observation · Complete original publisher JSON

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CVSS 4.0 · 2.3 CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

euvd · EUVD-2026-42422

Published

EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON.

Original publisher date fields

datePublished: Jul 8, 2026, 8:54:55 PM

dateUpdated: Jul 10, 2026, 2:14:39 PM

Source published: Jul 8, 2026, 8:54:55 PM (timezone not stated)
Source modified: Jul 10, 2026, 2:14:39 PM (timezone not stated)
Observed here: 7 Nov 2026 12:38:11 UTC
Source terms: ENISA EUVD · source terms and attribution apply

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EUVD CVSS 4.0 · 2.3 CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

nvd · CVE-2026-57481

Published

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.

Source analysis status: Deferred

Weakness classifications: CWE-200

Original publisher date fields

published: 2026-07-08T21:16:51.043

lastModified: 2026-10-25T17:10:00.197

Source published: 8 Jul 2026 21:16:51 UTC
Source modified: 25 Oct 2026 17:10:00 UTC
Observed here: 27 Oct 2026 15:15:28 UTC
Source terms: NIST NVD usage terms; underlying source attribution retained

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This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: nvd · NIST NVD usage terms; underlying source attribution retained. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS 4.0 · [email protected] · Secondary · 2.3 CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/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

osv · GHSA-97pr-9hgg-3p8r

Published

### Impact A Parse Server LiveQuery subscriber can receive object field values they are not authorized to read when a single `save` changes both an object field and the subscriber's ACL read access to that object. When such a save removes the subscriber's read access, the resulting `leave` event still carries the post-update object body, disclosing the new field values the subscriber is no longer permitted to read. The symmetric case applies to the `enter` event: when a save grants read access, the event includes the pre-grant object state the subscriber was not previously permitted to read. The disclosure is bounded to the single object affected by that save and is delivered only to the subscriber whose access changed. Applications that combine content changes with access-control changes in the same save on LiveQuery-enabled classes are affected. ### Patches Parse Server now verifies the subscriber's authorization for the specific object state included in `leave` and `enter` events. For a `leave` caused by the subscriber losing read access, the event delivers the last object state the subscriber was authorized to see instead of the post-update body. For an `enter` caused by the subscriber gaining read access, the previously unauthorized original object state is omitted. Events caused by a normal query-match change, where the subscriber keeps read access, are unaffected, as are master-key subscribers. ### Workarounds Do not change an object's field values and a subscriber's ACL read access in the same `save` on LiveQuery-enabled classes; perform the access-control change in a separate save before or after the content change. Alternatively, limit which classes are enabled for LiveQuery.

Source published: 19 Jun 2026 21:42:48 UTC
Source modified: 14 Jul 2026 16:40:56 UTC
Observed here: 24 Oct 2026 13:17:17 UTC
Source terms: GitHub Advisory Database · CC-BY-4.0

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This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: osv · GitHub Advisory Database · CC-BY-4.0. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS_V4 · CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

Publisher rating · LOW