CVE-2024-2440Network attack vector

Admin access retention via concurrent permission mutation

Published Apr 19, 2024 · Updated Aug 1, 2024

Race condition in GitHub Enterprise Server 3.9 through 3.12 allows remote authenticated users to retain access to detached repositories. A GraphQL permission mutation can complete while repository detachment is in progress, leaving administrator permissions attached after detachment. Exploitation requires an existing administrator and precise timing, and retained access permits unauthorized control and exposure of repository data.

CVSS severity5.5
Medium
EPSS probability0.45%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Race condition in GitHub Enterprise Server 3.9 through 3.12 allows remote authenticated users to retain access to detached repositories. A GraphQL permission mutation can complete while repository detachment is in progress, leaving administrator permissions attached after detachment. Exploitation requires an existing administrator and precise timing, and retained access permits unauthorized control and exposure of repository data.

The record

CVE
CVE-2024-2440
Published
Apr 19, 2024
Updated
Aug 1, 2024
Vendor
Twitter
Product
GitHub Enterprise Server
Classifications
CWE-367, CAPEC-29, T1098
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Apr 19, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 1, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=3.10.0 <3.10.10
  2. Affected versionversion=3.10 <=3.10.9 changes=[{"at":"3.10.10","status":"unaffected"}]
  3. Affected versionversion=3.11.0 <3.11.8
  4. Affected versionversion=3.11 <=3.11.7 changes=[{"at":"3.11.8","status":"unaffected"}]
  5. Affected versionversion=3.12.0 <3.12.2
  6. Affected versionversion=3.12 <=3.12.0 changes=[{"at":"3.12.1","status":"unaffected"}]
  7. Affected versionversion=3.9.0 <3.9.13
  8. Affected versionversion=3.9 <=3.9.12 changes=[{"at":"3.9.13","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Twitter · GitHub Enterprise Serverversion=3.10.0 <3.10.10; version=3.10 <=3.10.9 changes=[{"at":"3.10.10","status":"unaffected"}]; version=3.11.0 <3.11.8; version=3.11 <=3.11.7 changes=[{"at":"3.11.8","status":"unaffected"}]; version=3.12.0 <3.12.2; version=3.12 <=3.12.0 changes=[{"at":"3.12.1","status":"unaffected"}]; version=3.9.0 <3.9.13; version=3.9 <=3.9.12 changes=[{"at":"3.9.13","status":"unaffected"}]

Published CVSS scores

5.5GitHub, Inc.CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:H/A:L
5.9NIST NVDCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:N

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-367Time-of-check Time-of-use (TOCTOU) Race Condition
CAPEC-29Leveraging Time-of-Check and Time-of-Use (TOCTOU) Race Conditions
T1098Account Manipulation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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