How to fix CVE-2025-59088?

Within 30 days: Identify all affected systems and apply vendor patches as part of regular patch cycle. Implement egress filtering and URL validation for server-side requests.

Is Redhat affected by CVE-2025-59088?

CVE-2025-59088 presents significant security risk, a server-side request forgery vulnerability rated CVSS 8.6. Attackers could trick authenticated users into performing unintended actions, potentially modifying critical settings or data.

CVE-2025-59088

HIGH

2025-11-12 [email protected]

8.6

CVSS 3.1

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

None

Availability

None

Lifecycle Timeline

Patch Released

Apr 06, 2026 - 20:30 nvd

Patch available

Analysis Generated

Mar 28, 2026 - 19:21 vuln.today

CVE Published

Nov 12, 2025 - 17:15 nvd

HIGH 8.6

Description

If kdcproxy receives a request for a realm which does not have server addresses defined in its configuration, by default, it will query SRV records in the DNS zone matching the requested realm name. This creates a server-side request forgery vulnerability, since an attacker could send a request for a realm matching a DNS zone where they created SRV records pointing to arbitrary ports and hostnames (which may resolve to loopback or internal IP addresses). This vulnerability can be exploited to probe internal network topology and firewall rules, perform port scanning, and exfiltrate data. Deployments where the "use_dns" setting is explicitly set to false are not affected.

Analysis

If kdcproxy receives a request for a realm which does not have server addresses defined in its configuration, by default, it will query SRV records in the DNS zone matching the requested realm name. Rated high severity (CVSS 8.6), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Technical Context

This vulnerability is classified as Server-Side Request Forgery (SSRF) (CWE-918), which allows attackers to make the server perform requests to unintended internal or external resources. If kdcproxy receives a request for a realm which does not have server addresses defined in its configuration, by default, it will query SRV records in the DNS zone matching the requested realm name. This creates a server-side request forgery vulnerability, since an attacker could send a request for a realm matching a DNS zone where they created SRV records pointing to arbitrary ports and hostnames (which may resolve to loopback or internal IP addresses). This vulnerability can be exploited to probe internal network topology and firewall rules, perform port scanning, and exfiltrate data. Deployments where the "use_dns" setting is explicitly set to false are not affected.

Affected Products

See vendor advisory for affected versions.

Remediation

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Validate and allowlist destination URLs, block requests to internal networks, use network segmentation.

Priority Score

Low Medium High Critical

KEV: 0

EPSS: +0.1

CVSS: +43

POC: 0

Vendor Status

CVE-2025-59088 vulnerability details – vuln.today

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CVE-2025-59088

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CVE-2025-59088

CVSS Vector

Lifecycle Timeline

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Description

Analysis

Technical Context

Affected Products

Remediation

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External POC / Exploit Code