Is CVE-2026-30835 in the CISA KEV catalog?

No. CVE-2026-30835 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-30835?

CVE-2026-30835 has a CVSS v3 base score of 5.3 (MEDIUM).

What is the EPSS score for CVE-2026-30835?

CVE-2026-30835 has an EPSS score of 0.34% (25th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-30835?

Upgrade parse-server to 9.5.0 or later.

CVE & CISA-KEV Catalog

CVE-2026-30835

MEDIUM

5.3

CVSS v3

NVD

Description

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.7 and 9.5.0-alpha.6, malformed $regex query parameter (e.g. [abc) causes the database to return a structured error object that is passed unsanitized through the API response. This leaks database internals such as error messages, error codes, code names, cluster timestamps, and topology details. The vulnerability is exploitable by any client that can send query requests, depending on the deployment's permission configuration. This issue has been patched in versions 8.6.7 and 9.5.0-alpha.6.

CWE-209

How to fix

Remediation Available

parse-serverNVD

Affected:>= 9.0.0, < 9.5.0Fixed in:9.5.0CVE-2026-30835derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityNone

AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Exploit Intelligence

0.34%probability of exploitation in 30 days

25thpercentile

Low risk: more likely to be exploited than 25% of all known CVEs.

References

Patch1

github.com

Release Notes2

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-03-11.