Summary
The golang packages provide the Go programming language compiler.
Security Fix(es):
* golang.org/x/net/idna: golang: golang.org/x/net/idna: Privilege escalation via incorrect Punycode label processing (CVE-2026-39821)
* os: golang: Go os.Root: Symlink following vulnerability allows directory traversal (CVE-2026-39822)
Bug Fix(es) and Enhancement(s):
* Update Go to version 1.26.5+1 [almalinux-9.8.z] (JIRA:AlmaLinux-193476)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Fixed packages 8
| Release | Package | Fixed in |
|---|---|---|
| AlmaLinux · 9 | go-toolset | 1.26.5-1.el9_8 |
| AlmaLinux · 9 | golang | 1.26.5-1.el9_8 |
| AlmaLinux · 9 | golang-bin | 1.26.5-1.el9_8 |
| AlmaLinux · 9 | golang-docs | 1.26.5-1.el9_8 |
| AlmaLinux · 9 | golang-misc | 1.26.5-1.el9_8 |
| AlmaLinux · 9 | golang-race | 1.26.5-1.el9_8 |
| AlmaLinux · 9 | golang-src | 1.26.5-1.el9_8 |
| AlmaLinux · 9 | golang-tests | 1.26.5-1.el9_8 |
Vulnerabilities 3
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Critical 9.6
Invoking failure to reject ASCII-only Punycode-encoded labels in golang.org/x/net/idna
The ToASCII and ToUnicode functions incorrectly accept Punycode-encoded labels that decode to an ASCII-only label. For example, ToUnicode("xn--example-.com") incorrectly returns the name "example.com" rather than an error. This behavior can lead to privilege …
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High 7.8
Root escape via symlink plus trailing slash in os
On Unix systems, opening a file in an os.Root improperly follows symlinks to locations outside of the Root when the final path component of the a path is a symbolic link and the path ends in /. For example, 'root.Open("symlink/")' will open "symlink" even whe…
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Medium 5.3
Invoking Encrypted Client Hello privacy leak in crypto/tls
Handshakes which used Encrypted Client Hello could be de-anonymized by a passive network observer due to a disclosure of pre-shared key identities in the unencrypted client hello.