Security readout for executives and security teams
Plain-English summary
JetBrains IntelliJ IDEA versions before 2026.1.1 had a flaw where a guest user account could lead to command execution. For a business, this matters because successful exploitation could compromise confidentiality, integrity, and availability on affected developer workstations or environments.
Executive priority
Treat this as a high-priority developer-environment issue. Patch affected IntelliJ IDEA installations promptly, especially on systems tied to sensitive code, credentials, CI/CD access, or production operations.
Technical view
CVE-2026-49367 is a CWE-862 authorization issue in IntelliJ IDEA before 2026.1.1. The CVSS 3.1 score is 8.0 with network attack vector, low complexity, low privileges required, user interaction required, and high confidentiality, integrity, and availability impact.
Likely exposure
Exposure is limited to JetBrains IntelliJ IDEA deployments before 2026.1.1. Risk is most relevant where guest user accounts are available. The source bundle does not identify affected operating systems, editions, or exact configuration prerequisites.
Exploitation context
The source bundle does not show active exploitation, and KEV status is false. Public details are sparse: the known condition is command execution via the guest user account, with user interaction required per CVSS.
Researcher notes
Public evidence confirms product, fixed-before version, CWE, CVSS, and brief impact. It does not provide exploit mechanics, affected configurations, indicators of compromise, or confirmed exploitation. Avoid assuming broader JetBrains product impact without vendor confirmation.
Mitigation direction
- Upgrade IntelliJ IDEA to 2026.1.1 or later.
- Review JetBrains security guidance for any additional product-specific instructions.
- Restrict or disable guest user access where operationally possible.
- Prioritize developer systems with access to source code, credentials, or build pipelines.
Validation and detection
- Inventory IntelliJ IDEA installations and confirm versions are 2026.1.1 or later.
- Identify environments where guest user accounts are allowed.
- Check endpoint and identity logs for unusual guest-account activity.
- Verify developer workstations do not expose unnecessary remote access paths.
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-862: Authorization and privilege behavior lookup
Authorization weaknesses can support privilege escalation and valid-account review, depending on exploit path. 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 lookupCVE-2026-49367 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
- High
- CVSS
- 8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/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:L/UI:R/S:U/C:H/I:H/A:H2.15.9JetBrainsVulnerability scoring details
Base CVSS 3.1 score
8HighVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/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.
Missing Authorization
Missing Authorization represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.