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TI-2026-84842 Aliases CVE-2026-110288GHSA-34h8-2q57-6h55

GitHub Enterprise Server flaw lets attackers delete ChatOps settings

Priority LOW 23CWE-352Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Passive
Attack complexity
Low
Attack requirements
None
Impact type
Tampering
Confidentiality · integrity · availability
None · Low · Low
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-352.

Summary

GitHub Enterprise Server before 3.23 contains a cross-site request forgery flaw (CWE-352) in the Management Console. An unauthenticated attacker can make a signed-in operator's browser send a request that deletes stored Slack and Microsoft Teams ChatOps configuration and provider credentials, if the operator visits attacker-controlled content while signed in. The deletion can disrupt ChatOps notifications and commands once configuration is applied or services reload.

Written with Claude Haiku 5.5 from the sources below · 2026-11-04

Description from the CNA

A cross-site request forgery vulnerability was identified in GitHub Enterprise Server that allowed an unauthenticated attacker to delete stored Slack and Microsoft Teams ChatOps configuration and provider credentials by inducing an authenticated Management Console operator's browser to send a cross-site GET request to the integration removal endpoint without a CSRF token. Exploitation required configured ChatOps integrations and an operator visiting attacker-controlled content while signed in to the Management Console; deletion could disrupt ChatOps notifications and commands when configuration was applied or services reloaded. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.23 and was fixed in versions 3.19.14, 3.20.10, 3.21.8, and 3.22.3. This vulnerability was reported via the GitHub Bug Bounty program.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00187 8th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
GitHubEnterprise Server3.19.0 and later; 3.20.0 and later; 3.21.0 and later; 3.22.0 and later—No fix listedCNA
  • Enterprise Server VendorGitHub Affected 3.19.0 and later; 3.20.0 and later; 3.21.0 and later; 3.22.0 and later Fixed in — No fix listed CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:github:enterprise_server:*:*:*:*:*:*:*:*——GitHub
  • cpe:2.3:a:github:enterprise_server:*:*:*:*:*:*:*:* Versions — — ·GitHub

Remediation

Upgrade to GitHub Enterprise Server 3.19.14, 3.20.10, 3.21.8 or 3.22.3, using the fixed version for your release branch.

Written with Claude Haiku 5.5 from the sources below · 2026-11-04

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    GitHub Enterprise Server 3.19.*, 3.20.* and 2 more versions

    3 records Highest priority Priority LOW 3 LOW

    Other records, highest priority first

    • TI-2026-84840 Use-after-free in GitHub Enterprise Server allows code executionPriority LOW 36
    • TI-2026-84843 Out-of-bounds read in GitHub Enterprise Server leaks process memoryPriority LOW 24
    Show all 3 records →

Timeline

  1. 2026-11-03 Threatist record created from CVE-2026-110288
  2. 2026-11-04 Alias added: GHSA-34h8-2q57-6h55
  3. 2026-11-06 CISA SSVC decision points changed

References

Other 4

  • TI-2024-04632 An authentication bypass vulnerability was present in the GitHub Enterprise Server (GHES)… CVSS 4.0CRITICAL 10.0
  • TI-2024-00181 Unsafe Reflection in Github Enterprise Server leading to Command Injection CVSS 3.1CRITICAL 9.8
  • TI-2024-00466 Privilege Escalation by Code Injection in the Management Console in GitHub Enterprise Server CVSS 3.1HIGH 8.8
  • TI-2022-08539 Integer overflow in table parsing extension leads to heap memory corruption CVSS 3.1CRITICAL 9.8
  • TI-2026-34990 GitHub MCP Server: Nil Pointer Dereference DoS in completion/complete Handler CVSS 3.1HIGH 7.5
  • TI-2026-32884 GitHub Copilot CLI: Nested Bare Repository Can Execute Arbitrary Commands via core.fsmonitor CVSS 4.0HIGH 8.5
See all 178 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences