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TI-2026-25259 Aliases CVE-2026-32770GHSA-827p-g5x5-h86c

Parse Server: LiveQuery subscription with invalid regular expression crashes server

Priority LOW 34CWE-248Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-248.

Summary

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to 9.6.0-alpha.19 and 8.6.43, a remote attacker can crash the Parse Server by subscribing to a LiveQuery with an invalid regular expression pattern. The server process terminates when the invalid pattern reaches the regex engine during subscription matching, causing denial of service for all connected clients. The fix in 9.6.0-alpha.19 and 8.6.43 validates regular expression patterns at subscription time, rejecting invalid patterns before they are stored. Additionally, a defense-in-depth try-catch prevents any subscription matching error from crashing the server process. As a workaround, disable LiveQuery if it is not needed.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00584 48th percentileScored 2026-11-07
Fix Fixed parse-server (parse-community): 9.6.0-alpha.19, 8.6.43parse-server (npm): 9.6.0-alpha.19, 8.6.43

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
parse-communityparse-server9.0.0 to before 9.6.0-alpha.19; before 8.6.439.6.0-alpha.19, 8.6.43Patch availableCNA
—parse-server (npm)9.0.0 to before 9.6.0-alpha.199.6.0-alpha.19Patch availableGHSA-827p-g5x5-h86c
—parse-server (npm)before 8.6.438.6.43Patch availableGHSA-827p-g5x5-h86c
  • parse-server Vendorparse-community Affected 9.0.0 to before 9.6.0-alpha.19; before 8.6.43 Fixed in 9.6.0-alpha.19, 8.6.43 Patch available CNA
  • parse-server (npm) Vendor— Affected 9.0.0 to before 9.6.0-alpha.19 Fixed in 9.6.0-alpha.19 Patch available GHSA-827p-g5x5-h86c
  • parse-server (npm) Vendor— Affected before 8.6.43 Fixed in 8.6.43 Patch available GHSA-827p-g5x5-h86c

CPE configurations NVD · 19

CPEVersionsRoleVendor
cpe:2.3:a:parseplatform:parse-server:*:*:*:*:*:node.js:*:*before 8.6.43; 9.0.0 to before 9.6.0Vulnerableparse-community
cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha1:*:*:*:node.js:*:*9.6.0 alpha1Vulnerableparse-community
cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha10:*:*:*:node.js:*:*9.6.0 alpha10Vulnerableparse-community
cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha11:*:*:*:node.js:*:*9.6.0 alpha11Vulnerableparse-community
cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha12:*:*:*:node.js:*:*9.6.0 alpha12Vulnerableparse-community
cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha13:*:*:*:node.js:*:*9.6.0 alpha13Vulnerableparse-community
cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha14:*:*:*:node.js:*:*9.6.0 alpha14Vulnerableparse-community
cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha15:*:*:*:node.js:*:*9.6.0 alpha15Vulnerableparse-community
cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha16:*:*:*:node.js:*:*9.6.0 alpha16Vulnerableparse-community
cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha17:*:*:*:node.js:*:*9.6.0 alpha17Vulnerableparse-community
  • cpe:2.3:a:parseplatform:parse-server:*:*:*:*:*:node.js:*:* Versions before 8.6.43; 9.0.0 to before 9.6.0 Vulnerable ·parse-community
  • cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha1:*:*:*:node.js:*:* Versions 9.6.0 alpha1 Vulnerable ·parse-community
  • cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha10:*:*:*:node.js:*:* Versions 9.6.0 alpha10 Vulnerable ·parse-community
  • cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha11:*:*:*:node.js:*:* Versions 9.6.0 alpha11 Vulnerable ·parse-community
  • cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha12:*:*:*:node.js:*:* Versions 9.6.0 alpha12 Vulnerable ·parse-community
  • cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha13:*:*:*:node.js:*:* Versions 9.6.0 alpha13 Vulnerable ·parse-community
  • cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha14:*:*:*:node.js:*:* Versions 9.6.0 alpha14 Vulnerable ·parse-community
  • cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha15:*:*:*:node.js:*:* Versions 9.6.0 alpha15 Vulnerable ·parse-community
  • cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha16:*:*:*:node.js:*:* Versions 9.6.0 alpha16 Vulnerable ·parse-community
  • cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha17:*:*:*:node.js:*:* Versions 9.6.0 alpha17 Vulnerable ·parse-community
Show 9 more CPE
CPEVersionsRoleVendor
cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha18:*:*:*:node.js:*:*9.6.0 alpha18Vulnerableparse-community
cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha2:*:*:*:node.js:*:*9.6.0 alpha2Vulnerableparse-community
cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha3:*:*:*:node.js:*:*9.6.0 alpha3Vulnerableparse-community
cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha4:*:*:*:node.js:*:*9.6.0 alpha4Vulnerableparse-community
cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha5:*:*:*:node.js:*:*9.6.0 alpha5Vulnerableparse-community
cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha6:*:*:*:node.js:*:*9.6.0 alpha6Vulnerableparse-community
cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha7:*:*:*:node.js:*:*9.6.0 alpha7Vulnerableparse-community
cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha8:*:*:*:node.js:*:*9.6.0 alpha8Vulnerableparse-community
cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha9:*:*:*:node.js:*:*9.6.0 alpha9Vulnerableparse-community
  • cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha18:*:*:*:node.js:*:* Versions 9.6.0 alpha18 Vulnerable ·parse-community
  • cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha2:*:*:*:node.js:*:* Versions 9.6.0 alpha2 Vulnerable ·parse-community
  • cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha3:*:*:*:node.js:*:* Versions 9.6.0 alpha3 Vulnerable ·parse-community
  • cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha4:*:*:*:node.js:*:* Versions 9.6.0 alpha4 Vulnerable ·parse-community
  • cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha5:*:*:*:node.js:*:* Versions 9.6.0 alpha5 Vulnerable ·parse-community
  • cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha6:*:*:*:node.js:*:* Versions 9.6.0 alpha6 Vulnerable ·parse-community
  • cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha7:*:*:*:node.js:*:* Versions 9.6.0 alpha7 Vulnerable ·parse-community
  • cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha8:*:*:*:node.js:*:* Versions 9.6.0 alpha8 Vulnerable ·parse-community
  • cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha9:*:*:*:node.js:*:* Versions 9.6.0 alpha9 Vulnerable ·parse-community

Remediation

  • Fix · CNA parse-server (parse-community) Fixed in 9.6.0-alpha.19, 8.6.43
  • Fix · GHSA-827p-g5x5-h86c parse-server (npm) Fixed in 9.6.0-alpha.19 Advisory →
  • Fix · GHSA-827p-g5x5-h86c parse-server (npm) Fixed in 8.6.43 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-32770
  2. 2026-10-03 Alias added: GHSA-827p-g5x5-h86c
  3. 2026-10-25 EPSS moved to the below the 50th percentile

References

Advisory 2

Other 3

  • TI-2022-08574 Command Injection in Parse server CVSS 3.1CRITICAL 10.0
  • TI-2024-18136 Parse Server literalizeRegexPart SQL Injection CVSS 3.1CRITICAL 10.0
  • TI-2022-18768 Parse Server vulnerable to Remote Code Execution via prototype pollution in MongoDB BSON parser CVSS 3.1CRITICAL 9.8
  • TI-2024-31550 Parse Server's custom object ID allows to acquire role privileges CVSS 3.1HIGH 8.1
  • TI-2023-18316 Parse Server vulnerable to remote code execution via MongoDB BSON parser through prototype pollution CVSS 3.1CRITICAL 9.8
  • TI-2026-23790 Parse Server session token exfiltration via `redirectClassNameForKey` query parameter CVSS 4.0CRITICAL 9.9
See all 101 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences