Unrated

Denial of Service in Oracle MySQL Router via TLS

IdentifiersCVE-2026-46862CWE-400

CVE-2026-46862 is an easily exploitable denial-of-service vulnerability in Oracle MySQL Router, in the Router: General component. Affected versions are 8.4.0 through 8.4.9 and 9.0.0 through 9.7.0. According to Oracle, an unauthenticated attacker with network access via TLS can exploit the issue to compromise MySQL Router's availability. Successful exploitation can cause the service to hang or to crash in a frequently repeatable manner, resulting in complete denial of service. The specific vulnerable function or code path is not identified in the provided content.

For your environment

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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 unauthenticated remote attacker, reachable over the network via TLS, to repeatedly crash or hang MySQL Router. The resulting impact is complete denial of service of the router process or service, disrupting availability for applications and clients that depend on MySQL Router for database connectivity. No confidentiality or integrity impact is indicated in the provided information.

Mitigation

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

If immediate patching is not possible, reduce exposure by restricting or blocking the network protocols required for exploitation, specifically external or untrusted access to the TLS-exposed MySQL Router service. Limit network reachability to trusted clients only and remove unnecessary access where feasible. Oracle notes that such workarounds may affect application functionality and are not a substitute for patching.

Remediation

Patch, then assume compromise.

Apply Oracle's June 2026 Critical Security Patch Update for MySQL Router, or upgrade to a vendor-fixed release newer than the affected versions 8.4.0-8.4.9 and 9.0.0-9.7.0. Oracle also recommends remaining on actively supported product versions so security fixes are available.

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

OracleMysql Routerapplication

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

ACTIVITY FEED

Recent activity

2 sources tracked across advisories and community write-ups. News coverage will land here when it surfaces.

2 SOURCESView more in app

No news coverage yet. Advisories and community discussion only.

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 activity1

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

EXTERNAL REFERENCES

MITRE CVE

cve.org · CVE-2026-46862

NVD

nvd.nist.gov/vuln/detail/CVE-2026-46862

MITRE CWE · CWE-400

cwe.mitre.org