How severe is CVE-2026-25150?

CVE-2026-25150 has a CVSS 3.x base score of 9.3, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability low.

Is CVE-2026-25150 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-25150?

CVE-2026-25150 affects Qwik. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-25150?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2026-25150 have an EU (EUVD) identifier?

Yes. CVE-2026-25150 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-5165.

When was CVE-2026-25150 published?

CVE-2026-25150 was published on 2026-02-03 and last updated on 2026-06-17.

CVE-2026-25150

CVE-2026-25150 is a critical-severity vulnerability in Qwik with a CVSS 3.x base score of 9.3. 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-1321.

Key facts

Severity: Critical (CVSS 3.x base score 9.3)
EPSS exploit prediction: 1% (46th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-5165
Weakness: CWE-1321
Affected product: Qwik
Published: 2026-02-03
Last modified: 2026-06-17

Description

Qwik is a performance focused javascript framework. Prior to version 1.19.0, a prototype pollution vulnerability exists in the formToObj() function within @builder.io/qwik-city middleware. The function processes form field names with dot notation (e.g., user.name) to create nested objects, but fails to sanitize dangerous property names like __proto__, constructor, and prototype. This allows unauthenticated attackers to pollute Object.prototype by sending crafted HTTP POST requests, potentially leading to privilege escalation, authentication bypass, or denial of service. This issue has been patched in version 1.19.0.

Frequently asked questions

What is CVE-2026-25150?: Qwik is a performance focused javascript framework. Prior to version 1.19.0, a prototype pollution vulnerability exists in the formToObj() function within @builder.io/qwik-city middleware. The function processes form field names with dot notation (e.g., user.name) to create nested objects, but fails to sanitize dangerous property names like __proto__, constructor, and prototype. This allows unauthenticated attackers to pollute Object.prototype by sending crafted HTTP POST requests, potentially leading to privilege escalation, authentication bypass, or denial of service. This issue has been patched in version 1.19.0.
How severe is CVE-2026-25150?: CVE-2026-25150 has a CVSS 3.x base score of 9.3, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability low.
Is CVE-2026-25150 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-25150?: CVE-2026-25150 affects Qwik. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-25150?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2026-25150 have an EU (EUVD) identifier?: Yes. CVE-2026-25150 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-5165.
When was CVE-2026-25150 published?: CVE-2026-25150 was published on 2026-02-03 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:qwik:qwik:*:*:*:*:*:node.js:*:*

More vulnerabilities in Qwik

CVE-2023-1283 — Critical (CVSS 10.0): Code Injection in GitHub repository builderio/qwik prior to 0.21.0.
CVE-2026-27971 — Critical (CVSS 9.8): Qwik is a performance focused javascript framework. qwik <=1.19.0 is vulnerable to RCE due to an unsafe deserialization…
CVE-2026-32701 — High (CVSS 7.5): Qwik is a performance-focused JavaScript framework. Versions prior to 1.19.2 improperly inferred arrays from dotted…
CVE-2024-41677 — Medium (CVSS 6.3): Qwik is a performance focused javascript framework. A potential mutation XSS vulnerability exists in Qwik for versions…
CVE-2026-25149 — Medium (CVSS 6.1): Qwik is a performance focused javascript framework. Prior to version 1.19.0, an Open Redirect vulnerability in Qwik…
CVE-2026-25148 — Medium (CVSS 6.1): Qwik is a performance focused javascript framework. Prior to version 1.19.0, a Cross-Site Scripting vulnerability in…

All CVEs affecting Qwik →

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