CVE-2026-1434: Omega-PSIR is vulnerable to Reflected XSS via the lang parameter

Routine

MEDIUM 6.1UPGRADE

CVE-2026-1434 is a medium-severity flaw (CVSS 6.1) affecting omega-psir. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.2% (top 92%)
CISA exploited list	No
Weakness	CWE-79
Published	2026-02-27
Last modified	2026-06-17

Publisher (CNA): CERT.PL · Vendor: pw

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-02-27 11:16 UTCPublished CVE record published
2026-06-17 10:15 UTCUpdated Record last modified

pw omega-psir UPGRADE

Affected: >= 4.5.9 and < 4.6.7

Fixed in: 4.6.7

Safe to downgrade to: a release before 4.5.9

1. Check installed version

apt-cache policy omega-psir || rpm -q omega-psir || omega-psir --version

2. UPGRADE to 4.6.7 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade omega-psir

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade omega-psir

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 4.5.9 (Debian / Ubuntu)

apt-cache madison omega-psir sudo apt install omega-psir=<VERSION_BEFORE_4.5.9> sudo apt-mark hold omega-psir

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list omega-psir sudo dnf downgrade omega-psir-<VERSION_BEFORE_4.5.9> sudo dnf versionlock add omega-psir

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-1434?

omega-psir: upgrade to 4.6.7. Exact commands for each OS are on this page.

Is CVE-2026-1434 being exploited?

CVE-2026-1434 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-1434 affect?

CVE-2026-1434 affects omega-psir. Severity is medium (CVSS 6.1). 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.

How urgent is CVE-2026-1434?

Priority 23/100. No elevated risk signals yet.

References

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