Critical Security Update for Delve Debugger: Addressing Email Constraints and IPv6 Parsing Vulnerabilities
Summary
ALSA-2026:8842: Important: delve security update. Affects delve versions < 1.25.2-3.el10_1. Fixed in 1.25.2-3.el10_1. How to fix ↓
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Background
Delve is a powerful debugger designed specifically for the Go programming language, aimed at providing developers with a simple yet comprehensive debugging tool. It allows users to inspect variables, set breakpoints, and navigate through code execution seamlessly. However, recent vulnerabilities have been identified that could compromise the security of applications utilizing Delve, particularly concerning email constraints and IPv6 host literals.
Vulnerability Detail
The vulnerabilities in Delve stem from issues in the crypto/x509 and net/url packages. The first vulnerability (CVE-2026-27137) involves incorrect enforcement of email constraints, which could allow attackers to bypass security checks related to email validation. The second vulnerability (CVE-2026-25679) pertains to the incorrect parsing of IPv6 host literals, potentially leading to improper handling of network requests. These vulnerabilities could expose applications to various security risks, including unauthorized access and data leakage.
How To Fix
Minimum fixed version
1.25.2-3.el10_1
This is the first release that contains the fix.
sudo dnf update delveTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a temporary workaround, users can implement additional validation checks for email formats and ensure proper handling of IPv6 addresses in their applications until the package is updated. This may involve using regular expressions for email validation and ensuring that network requests are correctly formatted.
Conclusion
In summary, the Delve debugger has critical vulnerabilities that need immediate attention. Users are advised to update to the latest patched version to ensure their applications remain secure. Implementing temporary workarounds can help mitigate risks until the update is applied.
See every vulnerability recorded for delve →
FAQ
Delve is a debugger for the Go programming language, designed to help developers debug their applications effectively.
The vulnerabilities include incorrect enforcement of email constraints and improper parsing of IPv6 host literals, which could lead to security breaches.
You can use Vulert, which monitors open-source vulnerabilities in your software. Visit Vulert Scanner to check your application without needing to sign up.
Implement additional validation checks for email formats and ensure proper handling of IPv6 addresses as a temporary workaround.
For detailed information, refer to the CVE pages for CVE-2026-25679 and CVE-2026-27137.
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