How severe is CVE-2026-9519?

CVE-2026-9519 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2026-9519 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (26th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-9519?

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

Does CVE-2026-9519 have an EU (EUVD) identifier?

Yes. CVE-2026-9519 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-31778.

When was CVE-2026-9519 published?

CVE-2026-9519 was published on 2026-05-26 and last updated on 2026-06-17.

CVE-2026-9519

CVE-2026-9519 is a medium-severity vulnerability with a CVSS 3.x base score of 4.3. 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-79.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
CVSS v2: 5.0
CVSS v4: 2.1
EPSS exploit prediction: 0% (26th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-31778
Weakness: CWE-79
Published: 2026-05-26
Last modified: 2026-06-17

Description

A security flaw has been discovered in stonith404 pingvin-share up to 1.13.0. This affects the function getServerSideProps of the file frontend/src/pages/auth/signIn.tsx of the component Sign-in Auto-Redirect. The manipulation of the argument redirect results in cross site scripting. The attack may be performed from remote. The exploit has been released to the public and may be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.

Frequently asked questions

What is CVE-2026-9519?: A security flaw has been discovered in stonith404 pingvin-share up to 1.13.0. This affects the function getServerSideProps of the file frontend/src/pages/auth/signIn.tsx of the component Sign-in Auto-Redirect. The manipulation of the argument redirect results in cross site scripting. The attack may be performed from remote. The exploit has been released to the public and may be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.
How severe is CVE-2026-9519?: CVE-2026-9519 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2026-9519 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (26th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-9519?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-9519 have an EU (EUVD) identifier?: Yes. CVE-2026-9519 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-31778.
When was CVE-2026-9519 published?: CVE-2026-9519 was published on 2026-05-26 and last updated on 2026-06-17.

References

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