CVE-2025-58187 Quadratic complexity when checking name constraints in crypto/x509
Attackers can cause excessive CPU consumption in Go applications validating certificate chains due to quadratic complexity in name constraint checking.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-58187?
CVE-2025-58187 is a high-severity denial of service vulnerability in Golang Go, published on 29 Oct 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-407
Which versions are affected by CVE-2025-58187?
2 open source packages ship an affected version, including golang and stdlib. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
golang Bitnami | All versions | 1.24.9, 1.25.3 |
stdlib Go | All versions | 1.24.9, 1.25.3 |
Linux distribution packages (15)
go1.25 SUSE:Enterprise Storage 7.1 | All versions | 1.25.3-150000.1.19.1 |
go1.25 SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSS | All versions | 1.25.3-150000.1.19.1 |
go1.25 SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS | All versions | 1.25.3-150000.1.19.1 |
go1.25 SUSE:Linux Enterprise High Performance Computing 15 SP4-LTSS | All versions | 1.25.3-150000.1.19.1 |
go1.25 SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOS | All versions | 1.25.3-150000.1.19.1 |
go1.25 SUSE:Linux Enterprise High Performance Computing 15 SP5-LTSS | All versions | 1.25.3-150000.1.19.1 |
go1.25 SUSE:Linux Enterprise Module for Development Tools 15 SP6 | All versions | 1.25.3-150000.1.19.1 |
go1.25 SUSE:Linux Enterprise Module for Development Tools 15 SP7 | All versions | 1.25.3-150000.1.19.1 |
go1.25 SUSE:Linux Enterprise Server 15 SP3-LTSS | All versions | 1.25.3-150000.1.19.1 |
go1.25 SUSE:Linux Enterprise Server 15 SP4-LTSS | All versions | 1.25.3-150000.1.19.1 |
go1.25 SUSE:Linux Enterprise Server 15 SP5-LTSS | All versions | 1.25.3-150000.1.19.1 |
go1.25 SUSE:Linux Enterprise Server for SAP Applications 15 SP3 | All versions | 1.25.3-150000.1.19.1 |
go1.25 SUSE:Linux Enterprise Server for SAP Applications 15 SP4 | All versions | 1.25.3-150000.1.19.1 |
go1.25 SUSE:Linux Enterprise Server for SAP Applications 15 SP5 | All versions | 1.25.3-150000.1.19.1 |
go1.25 openSUSE:Leap 15.6 | All versions | 1.25.3-150000.1.19.1 |
Products include Golang Go.
How do I fix CVE-2025-58187?
Upgrade golang to a fixed version for your release line: 1.24.9 or 1.25.3.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2025-58187 being exploited?
There is no known exploitation of CVE-2025-58187 in the wild and no public exploit code.
Other vulnerabilities in Golang Go
- CVE-2020-0601 Microsoft Windows CryptoAPI Spoofing
- CVE-2026-27143 Missing bound checks can lead to memory corruption in safe Go in cmd/compile
- CVE-2024-24790 Unexpected behavior from Is methods for IPv4-mapped IPv6 addresses in net/netip
- CVE-2023-39320 Arbitrary code execution via go.mod toolchain directive in cmd/go
- CVE-2023-24540 Improper handling of JavaScript whitespace in html/template
Sources
Also known as AZL-78913, AZL-98688, BELL-CVE-2025-58187, BIT-golang-2025-58187, CLEANSTART-2026-OG31778, CLEANSTART-2026-TT67272 and 292 more.