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Medium

Elevation of Privilege in Azure Compute Gallery via Permissive Regular Expression

IdentifiersCVE-2026-23651CWE-266

CVE-2026-23651 is an elevation of privilege vulnerability in Azure Compute Gallery caused by a permissive regular expression. The provided content states that an authorized attacker can exploit this weakness locally to elevate privileges. The available information indicates the flaw stems from insufficiently restrictive input validation or pattern matching logic, allowing a user with existing authorization to bypass intended constraints and gain higher privileges than intended. No further technical details about the specific vulnerable function, code path, or affected versions are provided in the supplied content.

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ANALYST BRIEF

Impact, mitigation & remediation

What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.

Impact

What an attacker gets, and what they’ve been doing with it.

Successful exploitation allows an authorized local attacker to elevate privileges within the affected Azure Compute Gallery context. This could enable actions beyond the attacker's intended authorization level, potentially allowing access to protected resources, administrative operations, or broader control over the local environment associated with the vulnerable component. The precise post-exploitation scope is not specified in the provided content.

Mitigation

If you can’t patch tonight, do this now.

If immediate patching is not possible, reduce exposure by limiting local access to trusted, least-privileged authorized users only, reviewing and tightening role assignments, and monitoring for anomalous privilege changes or unauthorized administrative actions in Azure Compute Gallery-related workflows. Because the provided content does not include vendor-specific mitigations, no more specific mitigation can be stated from the available information.

Remediation

Patch, then assume compromise.

Apply the vendor-provided security update or fix for CVE-2026-23651 from Microsoft for the affected Azure Compute Gallery deployment or associated component. Because the supplied content does not include version-specific remediation guidance, affected organizations should consult Microsoft's official advisory for patched versions, rollout instructions, and any service-side remediation details.
PUBLIC EXPLOITS

Exploits

No public exploits tracked yet. Mallory keeps watching.

VALID 0 / 0 TOTALView more in app

No public exploit code observed for this vulnerability.

EXPOSURE SURFACE

Affected products & vendors

Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.

VendorProductType
Microsoft CorporationAci Confidential Containersapplication
Microsoft CorporationAzure Compute Galleryapplication
Microsoft CorporationAzure Container Instances (Aci) Confidential Containersapplication
Microsoft CorporationMicrosoft Aci Confidential Containersapplication

Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.

ACTIVITY FEED

Recent activity

3 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.

3 SOURCESView more in app
What this page doesn’t show

The version that knows your environment.

This page is what’s public. Mallory adds the parts that aren’t: which of your assets are affected, which adversaries are exploiting it right now, which detections to deploy, and what to do tonight.
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Exposure mapping

Query your assets running an affected version, and investigate the blast radius.

Threat actor evidence

Every observed campaign linking this CVE to a named adversary.

Associated malware

Malware families riding this exploit, with evidence and IOCs.

Detection signatures

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity2

Community discussion across Reddit, Mastodon, and other social sources.

EXTERNAL REFERENCES
MITRE CVE
cve.org · CVE-2026-23651
NVD
nvd.nist.gov/vuln/detail/CVE-2026-23651
MITRE CWE · CWE-266
cwe.mitre.org
Vendor Advisory
msrc.microsoft.com/update-guide/vulnerability/CVE-2026-23651