Security readout for executives and security teams
Plain-English summary
CVE-2026-26118 is a high-severity Microsoft Azure MCP Server Tools flaw where an authorized network attacker could abuse server-side request forgery to gain higher privileges. The business risk is elevated because the reported impact spans confidentiality, integrity, and availability, but the supplied sources do not show active exploitation.
Executive priority
Prioritize this as high where Azure MCP Server Tools is deployed, especially in environments with sensitive Azure access. The issue has severe potential impact, but urgency is moderated by no supplied evidence of active exploitation.
Technical view
The issue is CWE-918 SSRF in Azure MCP Server Tools. CVSS 3.1 is 8.8 with network attack vector, low complexity, low privileges required, no user interaction, unchanged scope, and high C/I/A impact. Affected packages are version 1.0.0 and 2.0.0-beta.1 across listed npm, NuGet, and PyPI distributions.
Likely exposure
Organizations using Azure MCP Server Tools 1.0.0 or 2.0.0-beta.1 from npm, NuGet, or PyPI are potentially exposed. Evidence is limited to the listed package versions; no other Microsoft products should be assumed affected from this bundle.
Exploitation context
The source bundle marks KEV as false and CVSS exploit maturity as unproven. This supports no claim of known active exploitation. Attack requires an authorized attacker with network access and low privileges, but the bundle does not describe the vulnerable request path.
Researcher notes
The available data does not identify the SSRF sink, trust boundary, or fixed package version. Treat this as an exposure-management item: confirm affected package presence, follow MSRC remediation metadata, and avoid assuming exploitability details beyond authorized network SSRF-based privilege elevation.
Mitigation direction
- Check Microsoft MSRC guidance for corrected package versions.
- Upgrade or remove affected Azure MCP Server Tools versions where present.
- Restrict tool access to trusted users and networks.
- Review outbound request controls for services using these tools.
- Monitor logs for unusual server-initiated network requests.
Validation and detection
- Inventory npm, NuGet, and PyPI dependencies for Azure MCP Server Tools.
- Confirm whether versions 1.0.0 or 2.0.0-beta.1 are installed.
- Verify remediation status against the MSRC advisory.
- Review access controls for users authorized to invoke the tools.
- Check telemetry for unexpected outbound requests from affected hosts.
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-918: Information exposure and cloud metadata lookup
Information exposure and SSRF weaknesses can make discovery, cloud metadata, and credential material review relevant. 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 lookupPrivilege behavior lookup
The CVE wording references privilege impact, so privilege escalation and authorization behavior review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCloud metadata behavior lookup
The CVE wording references SSRF or metadata access, so cloud discovery and credential material review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2026-26118 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
- 8.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
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:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C2.85.9microsoftVulnerability scoring details
Base CVSS 3.1 score
8.8HighVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
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
- Azure MCP Server Tools Elevation of Privilege VulnerabilityCVE reference, microsoft · vendor-advisory, patch
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.
Server-Side Request Forgery (SSRF)
Server-Side Request Forgery (SSRF) represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.