CVE-2025-58187 is classified as a high-severity vulnerability in the Golang Go programming language. This vulnerability allows for non-linear scaling of processing time when validating certain certificate chains due to the design of the name constraint checking algorithm. As a result, applications that rely on this functionality may experience performance degradation, which can be exploited in a network context.
The CVSS score for this vulnerability is 7.5, indicating a high level of severity that organizations must take seriously. The risk to organizations includes potential denial of service conditions, as the availability impact is rated as high. Attackers may leverage this vulnerability to cause delays in processing, which could affect the performance of applications that depend on timely certificate validation.
Currently, there are no known exploits for this vulnerability, and it has not been classified as actively exploited in the wild. However, given the potential impact, organizations should prioritize patching immediately to ensure their applications are not vulnerable to future exploitation.
The urgency for defenders is high, and organizations are advised to address this vulnerability in their next patch cycle. Ensuring that systems are updated with the latest patches will help mitigate the risks associated with CVE-2025-58187.
Vulnerability Details
The official CVE description states: 'Due to the design of the name constraint checking algorithm, the processing time of some inputs scale non-linearly with respect to the size of the certificate. This affects programs which validate arbitrary certificate chains.' This vulnerability is classified under CWE-407, which relates to ineffective filtering.
The CVSS vector for CVE-2025-58187 is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H, reflecting a network attack vector, low attack complexity, no privileges required, and no user interaction needed for exploitation.
The affected product is the 'go' component from the Golang vendor. The vulnerability was published on October 29, 2025, and it is still under analysis.
Technical Analysis
The root cause of CVE-2025-58187 is the design flaw in the name constraint checking algorithm used within the Golang's handling of certificate chains. Specifically, this flaw leads to non-linear increases in processing time for certain inputs, particularly as the size of the certificates increases.
The attack vector is classified as 'network', meaning that an attacker would need to be able to send crafted certificate chains to the vulnerable application. The attack complexity is rated as low, indicating that no special conditions are required for exploitation.
No privileges are required for this vulnerability, and user interaction is not necessary for an attack to be successful. The confidentiality impact is rated as none, and integrity impact is also none. However, the availability impact is rated as high, indicating that the vulnerability could result in significant denial of service conditions.
Risk & Impact Analysis
The real-world risk posed by CVE-2025-58187 is significant. Organizations that deploy applications using Golang's certificate validation may find themselves susceptible to performance degradation, potentially leading to denial of service. The blast radius could extend to any service utilizing the affected library, especially those that need to validate certificates in various contexts.
The urgency for remediation is high due to the CVSS score of 7.5. Organizations should prioritize patching immediately to mitigate risks associated with this vulnerability. The potential for exploitation in the future underscores the importance of proactive security measures.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
All versions of Go prior to 1.24.9 and versions from 1.25.0 to 1.25.3 are affected by CVE-2025-58187. Organizations should ensure they upgrade to versions that include the fix.
Mitigation & Remediation
To mitigate the risks associated with CVE-2025-58187, organizations should update to the latest version of Go that addresses this vulnerability. For further details on patching, organizations can refer to the official Golang release notes. Implementing additional monitoring of certificate validation processes may also help identify potential performance issues.
Detection Guidance
Organizations should monitor logs for unusual delays in certificate validation processes. Behavioral anomalies, such as significant increases in processing time when validating certificates, should be flagged for further investigation.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2025-58187 highlights the importance of robust design in cryptographic algorithms. Security teams should be aware of patterns in vulnerabilities related to performance issues, especially in libraries that handle security-critical operations. Strategic takeaways include the necessity of thorough testing and validation processes to catch design flaws before they lead to vulnerabilities.
Organizations can enhance their security posture by integrating continuous security testing practices into their development lifecycle. For further information on penetration testing methodologies, organizations may find it beneficial to explore resources on penetration testing as a service and its application in identifying such vulnerabilities.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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