CVE-2026-1434Network attack vector

Script execution via reflected lang parameter

Published Feb 27, 2026 · Updated Feb 27, 2026

Reflected XSS in Warsaw University of Technology Omega-PSIR 4.5.9 through 4.6.6 allows remote attackers to execute JavaScript. The application improperly validates the lang query parameter and reflects attacker-controlled input into a generated page, where the browser interprets it as script. A victim must open a crafted URL; execution is confined to the vulnerable application's browser origin and can affect data or actions available to that victim.

CVSS severity5.1
Medium
EPSS probability0.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in Warsaw University of Technology Omega-PSIR 4.5.9 through 4.6.6 allows remote attackers to execute JavaScript. The application improperly validates the lang query parameter and reflects attacker-controlled input into a generated page, where the browser interprets it as script. A victim must open a crafted URL; execution is confined to the vulnerable application's browser origin and can affect data or actions available to that victim.

The record

CVE
CVE-2026-1434
Published
Feb 27, 2026
Updated
Feb 27, 2026
Vendor
Warsaw University of Technology
Product
Omega-PSIR
Classifications
CWE-79, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 27, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 27, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.5.9 <=4.6.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Warsaw University of Technology · Omega-PSIRversion=4.5.9 <=4.6.6

Published CVSS scores

5.1CERT.PLCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1204.001User Execution: Malicious Link

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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