CVE-2026-89308: An unauthenticated OS command injection vulnerability exists in the ping.php endpoint, allowing remote attacke

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CRITICAL 9.3REMOTE

CVE-2026-89308 is a critical-severity flaw (CVSS 9.3) affecting affected software. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An unauthenticated OS command injection vulnerability exists in the ping.php endpoint, allowing remote attackers to execute arbitrary commands on the underlying operating system and achieve remote code execution.

Why this priority

Critical severity
CISA SSVC: automatable with total technical impact
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.3 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	2.1% (top 19%)
CISA exploited list	No
Weakness	CWE-78
Published	2026-09-15
Last modified	2026-09-18

Publisher (CNA): ENISA

Last updated 2026-09-18 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Timeline

2026-09-15 12:17 UTCPublished CVE record published
2026-09-18 19:24 UTCUpdated Record last modified

Exact fixes by distribution

Fedora ELN · xfsdump · FIXED · 3.3.0-3.eln159 · FEDORA-2026-6e9bb3f901 · source

sudo dnf upgrade --advisory=FEDORA-2026-6e9bb3f901

Fedora 46 · fio · FIXED · 3.43-2.fc46 · FEDORA-2026-b36219886b · source

sudo dnf upgrade --advisory=FEDORA-2026-b36219886b

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Write-up: www.acn.gov.it/portale/w/trexom-aggiornamenti-di-sicurezza

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-2026-89308?

No fixed release is listed yet. Watch the vendor advisory and apply any mitigation shown on this page.

Is CVE-2026-89308 being exploited?

CVE-2026-89308 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-2026-89308 affect?

CVE-2026-89308 affects affected software. Severity is critical (CVSS 9.3). An unauthenticated OS command injection vulnerability exists in the ping.php endpoint, allowing remote attackers to execute arbitrary commands on the underlying operating system and achieve remote code execution.

How urgent is CVE-2026-89308?

Priority 61/100. Critical severity; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action

Software pages

PHP vulnerabilities

References

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