What is CVE-2026-1434?

CVE-2026-1434 is a medium-severity vulnerability in Politechnika Warszawska Omega-Psir, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-02-27.

How severe is CVE-2026-1434?

Medium severity. CVSS v3 base score is 6.1 out of 10.

Is CVE-2026-1434 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in Politechnika Warszawska Omega-Psir

CVE-2026-1434

Omega-PSIR is vulnerable to Reflected XSS via the lang parameter. An attacker can craft a malicious URL that, when opened, causes arbitrary JavaScript to execute in the victim’s browser. This issue was fixed in 4.6.7.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.002 (5.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

Affected products

Politechnika Warszawska Omega-psir — versions 4.5.9
Pw Omega-psir

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

lukasz-rybak/CVE-2026-1434

References

cvd@cert.pl (Third Party Advisory, third-party-advisory)
cvd@cert.pl (Product, product)

Frequently asked questions

What is CVE-2026-1434?: CVE-2026-1434 is a medium-severity vulnerability in Politechnika Warszawska Omega-Psir, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-02-27.
How severe is CVE-2026-1434?: Medium severity. CVSS v3 base score is 6.1 out of 10.
Is CVE-2026-1434 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.