How severe is CVE-2026-33042?

CVE-2026-33042 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2026-33042 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (21st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-33042?

CVE-2026-33042 primarily affects Parseplatform Parse-server. In total, 29 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-33042?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-33042 have an EU (EUVD) identifier?

Yes. CVE-2026-33042 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-12993.

When was CVE-2026-33042 published?

CVE-2026-33042 was published on 2026-03-18 and last updated on 2026-06-17.

CVE-2026-33042

CVE-2026-33042 is a medium-severity vulnerability in Parseplatform Parse-server with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-287.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v4: 6.9
EPSS exploit prediction: 0% (21st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-12993
Weakness: CWE-287
Affected product: Parseplatform Parse-server
Published: 2026-03-18
Last modified: 2026-06-17

Description

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.29 and 8.6.49, a user can sign up without providing credentials by sending an empty `authData` object, bypassing the username and password requirement. This allows the creation of authenticated sessions without proper credentials, even when anonymous users are disabled. The fix in 9.6.0-alpha.29 and 8.6.49 ensures that empty or non-actionable `authData` is treated the same as absent `authData` for the purpose of credential validation on new user creation. Username and password are now required when no valid auth provider data is present. As a workaround, use a Cloud Code `beforeSave` trigger on the `_User` class to reject signups where `authData` is empty and no username/password is provided.

Frequently asked questions

What is CVE-2026-33042?: 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.29 and 8.6.49, a user can sign up without providing credentials by sending an empty `authData` object, bypassing the username and password requirement. This allows the creation of authenticated sessions without proper credentials, even when anonymous users are disabled. The fix in 9.6.0-alpha.29 and 8.6.49 ensures that empty or non-actionable `authData` is treated the same as absent `authData` for the purpose of credential validation on new user creation. Username and password are now required when no valid auth provider data is present. As a workaround, use a Cloud Code `beforeSave` trigger on the `_User` class to reject signups where `authData` is empty and no username/password is provided.
How severe is CVE-2026-33042?: CVE-2026-33042 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2026-33042 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (21st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-33042?: CVE-2026-33042 primarily affects Parseplatform Parse-server. In total, 29 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-33042?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-33042 have an EU (EUVD) identifier?: Yes. CVE-2026-33042 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-12993.
When was CVE-2026-33042 published?: CVE-2026-33042 was published on 2026-03-18 and last updated on 2026-06-17.

References

Affected products (29)

cpe:2.3:a:parseplatform:parse-server:*:*:*:*:*:node.js:*:*
cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha1:*:*:*:node.js:*:*
cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha10:*:*:*:node.js:*:*
cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha11:*:*:*:node.js:*:*
cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha12:*:*:*:node.js:*:*
cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha13:*:*:*:node.js:*:*
cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha14:*:*:*:node.js:*:*
cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha15:*:*:*:node.js:*:*
cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha16:*:*:*:node.js:*:*
cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha17:*:*:*:node.js:*:*
cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha18:*:*:*:node.js:*:*
cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha19:*:*:*:node.js:*:*
cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha2:*:*:*:node.js:*:*
cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha20:*:*:*:node.js:*:*
cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha21:*:*:*:node.js:*:*
cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha22:*:*:*:node.js:*:*
cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha23:*:*:*:node.js:*:*
cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha24:*:*:*:node.js:*:*
cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha25:*:*:*:node.js:*:*
cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha26:*:*:*:node.js:*:*
cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha27:*:*:*:node.js:*:*
cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha28:*:*:*:node.js:*:*
cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha3:*:*:*:node.js:*:*
cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha4:*:*:*:node.js:*:*
cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha5:*:*:*:node.js:*:*
cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha6:*:*:*:node.js:*:*
cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha7:*:*:*:node.js:*:*
cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha8:*:*:*:node.js:*:*
cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha9:*:*:*:node.js:*:*

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Other CWE-287 (Improper Authentication) vulnerabilities

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