Security readout for executives and security teams
Plain-English summary
A high-privilege user could trigger code execution through Git VCS root handling in vulnerable JetBrains TeamCity releases. Successful exploitation could compromise the TeamCity server, build processes, credentials, and connected systems. The CVSS score is 9.1, but the supplied record indicates that high privileges are required.
Executive priority
Treat this as an urgent remediation item for affected TeamCity environments, especially systems controlling production builds or deployments. Prioritize version verification, upgrading, privileged-access review, and investigation of suspicious VCS-root changes. Immediate incident escalation is warranted only if evidence of misuse or unexplained administrative changes is found.
Technical view
CVE-2026-65907 is classified as CWE-94 code injection. Its CVSS 3.1 vector indicates network access, low complexity, high privileges, no user interaction, changed scope, and high confidentiality, integrity, and availability impact. The record names TeamCity releases before 2026.1.2 and 2025.11.6, but provides limited technical detail.
Likely exposure
Exposure is most likely where TeamCity runs an earlier affected release and privileged users can configure Git VCS roots. Internet reachability may increase access opportunities, but the supplied sources do not establish that unauthenticated attackers or ordinary project users can exploit the issue.
Exploitation context
The supplied record does not identify public exploitation, exploit code, or inclusion in CISA KEV. Active exploitation should therefore not be claimed. The high-privilege requirement reduces attacker accessibility, while TeamCity's access to source code, build agents, secrets, and deployment workflows makes successful compromise potentially severe.
Researcher notes
The public bundle is sparse and provides no root cause, affected component details, indicators, or exploitation evidence. Its structured affected entry lists version "0" with default status "unaffected," which conflicts with the title's release boundaries. Use the title and vendor advisory for triage, but verify precise affected builds with JetBrains before closing exposure.
Mitigation direction
- Upgrade to TeamCity 2026.1.2 or 2025.11.6, as appropriate for the deployed release line.
- Confirm exact affected and fixed builds against current JetBrains security guidance.
- Restrict permission to create or modify Git VCS roots to essential administrators.
- Review privileged TeamCity accounts and revoke unnecessary or stale access.
- Limit TeamCity network exposure while remediation is pending.
Validation and detection
- Inventory every TeamCity server and record its exact installed version.
- Confirm each instance is on 2026.1.2, 2025.11.6, or a later applicable release.
- Identify users and integrations permitted to modify Git VCS roots.
- Review recent Git VCS root changes and privileged account activity for anomalies.
- Verify build agents, secrets, and deployment integrations show no unexpected changes.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-94: Code execution behavior lookup
Code execution and unsafe deserialization weaknesses often justify reviewing execution behavior and process telemetry. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2026-65907 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Critical
- CVSS
- 9.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H2.36JetBrainsVulnerability scoring details
Base CVSS 3.1 score
9.1CriticalVector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://www.jetbrains.com/privacy-security/issues-fixed/CVE reference, JetBrains
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Control of Generation of Code ('Code Injection')
Improper Control of Generation of Code ('Code Injection') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.