openSUSE-SU-2026:0280-1: important: Security update for go-sendxmpp

   openSUSE Security Update: Security update for go-sendxmpp
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Announcement ID:    openSUSE-SU-2026:0280-1
Rating:             important
References:         #1266617 
Cross-References:   CVE-2026-39821
CVSS scores:
                    CVE-2026-39821 (SUSE): 9.1 CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

Affected Products:
                    openSUSE Backports SLE-15-SP7
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   An update that fixes one vulnerability is now available.

Description:

   This update for go-sendxmpp fixes the following issues:

   - Update to 0.17.0:
     * Add --ox-transfer-private-key to transfer the encrypted private key to
       PEP to transfer it to other devices (requires go-xmpp >= v0.3.7).
     * Add --ox-receive-private-key to receive the encrypted private key from
       PEP.
     * Add config option no_root_warning.
     * Add config option no_legacy_pgp_warning.
     * Also disable legacy PGP when running as root (Ox was already disabled).
     * Disable pinning for not using PLAIN when running as root.
     * Add config option ox_trust_mode with settings blind and tofu.
     * Due to new tofu trust mode for Ox, only one public key per contact is
       accepted for easier ID handling.
     * Ox: Check that fingerprint of received key equals the advertised one.
     * CVE-2026-39821: Failure to reject ASCII-only Punycode-encoded labels
       allows for validation bypass and privilege escalation (boo#1266617):
       Bump net to 0.57.0


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-2026-280=1



Package List:

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

      go-sendxmpp-0.17.0-bp157.2.12.1


References:

   https://www.suse.com/security/cve/CVE-2026-39821.html
   https://bugzilla.suse.com/1266617