Octopus Deploy Octopus Server up to 2026.1.11780/2026.2.13437/2026.3.15815 OIDC Token Issuer Validation improper authentication

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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9.5$0-$5k1.65-

Summaryinfo

A vulnerability categorized as very critical has been discovered in Octopus Deploy Octopus Server up to 2026.1.11780/2026.2.13437/2026.3.15815. Affected by this issue is some unknown functionality of the component OIDC Token Issuer Validation. Executing a manipulation can lead to improper authentication. This vulnerability is registered as CVE-2026-116870. It is possible to launch the attack remotely. No exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Octopus Deploy Octopus Server up to 2026.1.11780/2026.2.13437/2026.3.15815. It has been declared as very critical. This vulnerability affects an unknown functionality of the component OIDC Token Issuer Validation. The manipulation with an unknown input leads to a improper authentication vulnerability. The CWE definition for the vulnerability is CWE-287. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

In affected versions of Octopus Server, OIDC token issuer validation was performed inconsistently. This could result in a token issued from a suitably configured non legitimate issuer being accepted as a token belonging to a service account from a legitimate trusted issuer. Exploitation requires a service account with at least one OIDC identity configured. An attacker would also need to know or guess some details of that identity in order to be in a position to attempt exploitation.

The advisory is shared for download at advisories.octopus.com. This vulnerability was named CVE-2026-116870 since 10/27/2026. The exploitation appears to be easy. The attack can be initiated remotely. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 10/27/2026).

Upgrading to version 2026.1.11781, 2026.2.13438 or 2026.3.15816 eliminates this vulnerability.

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 9.9
VulDB Meta Temp Score: 9.5

VulDB Base Score: 9.9
VulDB Temp Score: 9.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Improper authentication
CWE: CWE-287
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Octopus Server 2026.1.11781/2026.2.13438/2026.3.15816

Timelineinfo

10/27/2026 Advisory disclosed
10/27/2026 +0 days CVE reserved
10/27/2026 +0 days VulDB entry created
10/27/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: advisories.octopus.com
Status: Confirmed

CVE: CVE-2026-116870 (🔒)
GCVE (CVE): GCVE-0-2026-116870
GCVE (VulDB): GCVE-100-427120

Entryinfo

Created: 10/27/2026 11:46
Changes: 10/27/2026 11:46 (66)
Complete: 🔍
Cache ID: 216::103

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