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openSUSE Advisory 2026-0259-1 gh Important Punycode Fix CVE-2026-39821

opensuse
Calendar Grey July 24, 2026
Scroller Opensuse
Update for openSUSE fixes important Punycode issue in gh affecting Backports SLE-15-SP7 security.
openSUSE released a security update for the gh package to address CVE-2026-39821, which involves rejecting certain Punycode labels in the idna package, rated important.

Description

This update for gh fixes the following issues:

- CVE-2026-39821: reject all-ASCII xn-- Punycode labels in the vendored

golang.org/x/net/idna package regardless of Go's unicode.Version

(boo#1266618).

Topics%20covered

Topics Covered

security advisory important integer overflow OpenSUSE Punycode reject

Patch

Patch Instructions:

To install this openSUSE Security Update use the SUSE recommended installation methods

like YaST online_update or "zypper patch".

Alternatively you can run the command listed for your product:

- openSUSE Backports SLE-15-SP7:

zypper in -t patch openSUSE-2026-259=1

Package List

- openSUSE Backports SLE-15-SP7 (aarch64 i586 ppc64le s390x x86_64):

gh-2.96.0-bp157.2.24.1

- openSUSE Backports SLE-15-SP7 (noarch):

gh-bash-completion-2.96.0-bp157.2.24.1

gh-fish-completion-2.96.0-bp157.2.24.1

gh-zsh-completion-2.96.0-bp157.2.24.1

References

https://www.suse.com/security/cve/CVE-2026-39821.html

https://bugzilla.suse.com/1266618

Severity
important
Lowest
Low
Medium
High
Critical

Announcement ID: openSUSE-SU-2026:0259-1
Rating: important

Topics%20covered

Topics Covered

security advisory important integer overflow OpenSUSE Punycode reject

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