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VulnerabilityPublished Updated

CVE-2026-68006: Puma v.5.0.0 · CWE-444

Affects pumaSource GCVE Database

0
Authoritative record:CVE-2026-68006· Critical 9.1

Not known to be exploited · CVSS 9.1 Critical.

Data as of 26 Oct 2026, 09:16 UTC

CVSS 3.1 base score
9.1Critical
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.5% chance of exploitation in 30 days – higher than 44% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 10 Sep 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

Affected software

ProductAffectedFixed in
Ubuntu:Pro:20.04:LTSpumapkg:deb/ubuntu/puma?arch=source&distro=esm-apps/focalOther threatsAffected
  • =3.12.0-2ubuntu1
  • =3.12.0-4ubuntu1
  • =3.12.4-1ubuntu2
  • =3.12.4-1ubuntu2+esm1
  • =3.12.4-1ubuntu2+esm2
Fixed in–
Ubuntu:Pro:22.04:LTSpumapkg:deb/ubuntu/puma?arch=source&distro=esm-apps/jammyOther threatsAffected
  • =4.3.6-1ubuntu4
  • =5.5.2-2ubuntu2
  • =5.5.2-2ubuntu2+esm1
  • =5.5.2-2ubuntu2+esm2
Fixed in–
Ubuntu:24.04:LTSpumapkg:deb/ubuntu/puma?arch=source&distro=nobleOther threatsAffected
  • =5.6.5-4ubuntu2
  • =5.6.5-4ubuntu3
  • =6.4.2-4ubuntu1
  • =6.4.2-4ubuntu3
  • =6.4.2-4ubuntu4
  • =6.4.2-4ubuntu4.3
Fixed in–
Ubuntu:26.10pumapkg:deb/ubuntu/puma?arch=source&distro=stonkingOther threatsAffected
  • =6.6.0-4build1
  • =8.0.2-3build1
Fixed in–
Ubuntu:26.04:LTSpumapkg:deb/ubuntu/puma?arch=source&distro=resoluteOther threatsAffected
  • =6.6.0-4
  • =6.6.0-4build1
Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Until an official fix is available, consider restricting network exposure of Puma servers and applying compensating controls to limit attack surface. Monitor vendor channels for updates and patches addressing this vulnerability.

Description

A critical remote code execution vulnerability (CVE-2026-68006) exists in Puma web server versions from 5.0.0 up to but not including 8.0.3. The flaw is located in the ext/puma_http11/http11_parser.rl file and allows unauthenticated attackers to execute arbitrary code remotely. The vulnerability has a high CVSS score of 9.1, indicating severe impact on confidentiality and integrity without requiring user interaction or privileges.

References

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