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CriticalVulnerabilityCVE-2026-62008updated 29 Oct 2026, 20:19 UTC

Orpheus has an unauthenticated PHP object injection flaw

Attackers can send specially crafted data to the Orpheus software without logging in, which may let them run their own code on the server. Anyone running an affected version should treat it as urgent.

Official, 2 sources
SeverityCriticalCVSS 9.8 of 10
Being exploited?UnclearNo reports either way yet
Fix available?UnclearNo fixed version published in the sources yet
How sure is this?Official, 2 sourcesBacked by an official source

How the attack works simplified

  1. 1Attacker sends payloadCrafted serialized data, no login needed
  2. 2Orpheus unserializes inputUntrusted data processed as PHP objects
  3. 3Code runs on serverInjected object triggers unintended behavior
  4. ResultAttacker may gain control of the server

What happened

Unauthenticated PHP Object Injection in Orpheus versions 1.8 and earlier, allowing unsafe deserialization of attacker-supplied data.

Why it is dangerous: An attacker who can reach the application over the network without credentials could potentially take control of the server or its data. Any site or organization running an affected Orpheus version is at risk.

Are you affected?

You are affected if you run Orpheus version 1.8 or earlier.

Orpheus <= 1.8

What to do

  1. Check whether you run Orpheus version 1.8 or earlier
  2. Restrict network access to the Orpheus application until a fix is confirmed
  3. Watch the GitHub advisory GHSA-3r4p-5j69-675v for a patched version and update as soon as one is released

Timeline

  1. 29 Oct 2026, 16:18 UTC
    Publicly disclosed
  2. 29 Oct 2026, 16:18 UTC
    Reported by NVD · NVD
  3. 29 Oct 2026, 16:20 UTC
    Picked up by Zero Radar
  4. 29 Oct 2026, 20:19 UTC
    GitHub Advisory reported on it · GitHub Advisory

Sources 2 reports, oldest first

Official vendor, government CERT or advisory database

Technical details

ID
CVE-2026-62008 · GHSA-3r4p-5j69-675v
CVSS
9.8 / 10
EPSS
0.4% chance of exploitation within 30 days
Disclosed
29 Oct 2026, 16:18 UTC
On Zero Radar
29 Oct 2026, 16:20 UTC (2 min after disclosure)
Last change
29 Oct 2026, 20:19 UTC

The plain-language parts and the attack diagram were written by an AI model (anthropic/claude-haiku-5.5) from the sources above. Facts like versions, exploitation and dates come from the sources themselves. How Zero Radar works

Orpheus has an unauthenticated PHP object injection flaw · Zero Radar