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CVE-2026-91778

HIGH
7.2
CVSS Score
Published: September 15, 2026 at 07:05 AM UTC
Updated: September 16, 2026 at 07:54 PM UTC
1 product affected across 1 vendorOctopus Server

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Severity
HIGH7.2
Exploit prediction
EPSS 0.4%
SSVC
No known exploit

Description

In affected versions of Octopus Server, users with certain scoped permission sets could execute arbitrary scripts on a worker (including the Octopus Server built-in worker). Incorrect permission validation during script execution would allow the script to execute without the user possessing the required authorisation.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Octopus Server· Octopus Deploy
60%
2019.0.0 ≤ v < 2026.1.117252026.2.0 ≤ v < 2026.2.133442026.3.0 ≤ v < 2026.3.118162019.0.02026.2.02026.3.0
Affected range stops below 2026.1.11725, so it looks safe — our inference, not a vendor statement
Affected range stops below 2026.2.13344, so it looks safe — our inference, not a vendor statement
Affected range stops below 2026.3.11816, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

Source: cverecord
https://advisories.octopus.com/post/2026/sa2026-08

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.2HIGHOctopus
Vector?

Quick Info

StatusAWAITING ANALYSIS
CWE
CWE-863

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