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VulnerabilityPublished

CVE-2026-127081: OpsTree Solutions BuildPiper · Insecure Direct Object Reference

Affects OpsTree Solutions BuildPiperSource CVE Database V5

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Not known to be exploited · CVSS 5.3 Medium : upgrade to 2.7.0 when convenient.

Data as of 13 Nov 2026, 10:12 UTC

CVSS 4.0 base score
5.3Medium
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (VulnCheck)CVSS 4.05.3
CNA (VulnCheck)CVSS 3.14.3
Patch
Available – fixed in 2.7.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 13 Nov 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: 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 13 Nov 2026.

What to do

Upgrade BuildPiper and opstree/buildpiper to 2.7.0.

Affected software

ProductAffectedFixed in
OpsTree SolutionsBuildPiperAffected
  • <2.7.0
Fixed in
  • 2.7.0
GitHubopstree/buildpiperpkg:github/opstree/buildpiperOther threatsAffected
  • <2.7.0
Fixed in
  • 2.7.0

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

AI-suggested

Upgrade BuildPiper to version 2.7.0 or later, where this authorization bypass vulnerability is fixed. No other mitigation actions are indicated by the vendor advisory.

Description

OpsTree BuildPiper versions before 2.7.0 have an authorization bypass vulnerability that allows authenticated users to link pipeline stages to environments of other projects by submitting a foreign project environment identifier. This bypasses project separation controls and can lead to unauthorized cross-project associations.

References

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