CVE-2025-58189 ALPN negotiation error contains attacker controlled information in crypto/tls
An attacker can inject unescaped data into error logs during failed TLS handshakes, potentially exposing sensitive information to system administrators.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-58189?
CVE-2025-58189 is a medium-severity 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
When Conn.Handshake fails during ALPN negotiation the error contains attacker controlled information (the ALPN protocols sent by the client) which is not escaped.
Weakness: CWE-532
Which versions are affected by CVE-2025-58189?
2 open source packages ship an affected version, including golang and stdlib. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
golang Bitnami | All versions | 1.24.8, 1.25.2 |
stdlib Go | All versions | 1.24.8, 1.25.2 |
Products include Golang Go.
How do I fix CVE-2025-58189?
Upgrade golang to a fixed version for your release line: 1.24.8 or 1.25.2.
Is CVE-2025-58189 being exploited?
There is no known exploitation of CVE-2025-58189 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-78917, AZL-98832, BELL-CVE-2025-58189, BIT-golang-2025-58189, CLEANSTART-2026-MM35384, CLEANSTART-2026-YA61137 and 282 more.