PT-2026-29279 · Unknown · Parse Server

Bugbunny-Research · Published 2026-03-31 · Updated 2026-04-06 · CVE-2026-34595

Positive Technologies (AI Summary)

CVSS v4.0

5.3

Medium

Base vector

AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

Parse Server versions prior to 8.6.70 and 9.7.0-alpha.18

An authenticated user with find class-level permission can bypass the protectedFields class-level permission setting on LiveQuery subscriptions. By sending a subscription with a $or, $and, or $nor operator value as a plain object with numeric keys and a length property instead of an array, the protected-field guard is bypassed. The subscription event firing acts as a binary oracle, allowing the attacker to infer whether a protected field matches a given test value.

Update to version 8.6.70 or 9.7.0-alpha.18 to resolve this issue.

Exploit

Fix

Type Confusion

Weakness Enumeration

CWE-843

Related Identifiers

BIT-PARSE-2026-34595

CVE-2026-34595

GHSA-MMG8-87C5-JRC2

Affected Products

Parse Server

References · 11

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34595.json · Exploit
• https://github.com/parse-community/parse-server/commit/f63fd1a3fe0a7c1c5fe809f01b0e04759e8c9b98 · Patch
• https://github.com/parse-community/parse-server/pull/10350 · Patch
• https://github.com/parse-community/parse-server/security/advisories/GHSA-mmg8-87c5-jrc2 · Vendor Advisory
• https://github.com/parse-community/parse-server/commit/ffad0ec6b971ee0dd9545e1bf1fb34ddebf275c2 · Patch
• https://github.com/parse-community/parse-server/pull/10351 · Patch
• https://osv.dev/vulnerability/CVE-2026-34595 · Vendor Advisory
• https://osv.dev/vulnerability/BIT-parse-2026-34595 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-mmg8-87c5-jrc2 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-34595 · Security Note
• https://github.com/parse-community/parse-server · Note