CVE-2021-22869Network attack vector

Cross-group workflow execution via improper authentication

Published Sep 24, 2021 · Updated Aug 3, 2024

GitHub Enterprise Server 3.0.0 through 3.0.15 and 3.1.0 through 3.1.7 allows attackers to run jobs in unauthorized runner groups. The workflow-job request path failed to verify that the requesting repository could access the selected enterprise runner group. Exploitation requires repository access and configured self-hosted runner groups, and it executes workflow code on an unintended runner group.

CVSS severity9.8
Critical
EPSS probability1.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

GitHub Enterprise Server 3.0.0 through 3.0.15 and 3.1.0 through 3.1.7 allows attackers to run jobs in unauthorized runner groups. The workflow-job request path failed to verify that the requesting repository could access the selected enterprise runner group. Exploitation requires repository access and configured self-hosted runner groups, and it executes workflow code on an unintended runner group.

The record

CVE
CVE-2021-22869
Published
Sep 24, 2021
Updated
Aug 3, 2024
Vendor
Twitter
Product
GitHub Enterprise Server
Classifications
CWE-668, CWE-287
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 24, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=3.0 <3.0.16
  2. Affected versionversion=3.1 <3.1.8

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Twitter · GitHub Enterprise Serverversion=3.0 <3.0.16; version=3.1 <3.1.8

Published CVSS scores

7.5NISTAV:N/AC:L/Au:N/C:P/I:P/A:P
9.8NISTCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-668Exposure of Resource to Wrong Sphere
CWE-287Improper Authentication

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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