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CVE-2026-56852VulnerabilityPublished Updated

SUSE · Security update for google-guest-agent

Affects SUSESource GCVE Database

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Mentioned vulnerabilities

Authoritative record:CVE-2026-56852· High 7.5

Not known to be exploited · CVSS 7.5 High : upgrade SUSE norm to 0.39.0 soon.

Data as of 10 Nov 2026, 20:06 UTC

CVSS 3.1 base score
7.5High
How severe the flaw is on the 0–10 CVSS scale.
Patch
Available – fixed in 0.39.0
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 21 Jul 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 10 Nov 2026.

What to do

Upgrade golang.org/x/text/unicode/norm to 0.39.0.

Affected software

ProductAffectedFixed in
golang.org/x/textgolang.org/x/text/unicode/normAffected
  • <0.39.0
Fixed in
  • 0.39.0
Gogolang.org/x/text/unicode/normpkg:golang/golang.org/x/text/unicode/normOther threatsAffected
  • <0.39.0
Fixed in
  • 0.39.0

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

Description

This update for google-guest-agent fixes the following issues: - CVE-2026-56852: golang.org/x/text/unicode/norm: infinite loop on truncated/invalid UTF-8 input (bsc#1272118). - CVE-2026-56854,CVE-2026-56855,CVE-2026-78662: golang.org/x/crypto/ssh: authentication bypass and deadlocks in the crypto/ssh library (bsc#1278597). - CVE-2026-84303: google.golang.org/grpc: xDS RBAC HTTP filter implementation issue allows for bypass of authorization policies via mixed-case or canonical-case header matches (bsc#1279297). - CVE-2026-84304: google.golang.org/grpc: heap memory exhaustion via HTTP/2 DATA frame fragmentation (bsc#1279414). - CVE-2026-84445: google.golang.org/grpc: DoS via crash due to missing ':authority' and 'Host' headers in gRPC-Go xDS servers (bsc#1278967). Changes for google-guest-agent: - Update to version 20260903.01 * Update dependencies to latest (#636) * fix octal digit comparison in morePermissive (#631) * Remove KillMode from google-guest-agent-manager (#629) * Fix SUSE Linux Micro 6+ (#628) + Fix oslogin for Micro 6+ * Exclude irrelevant tests on FreeBSD (#625) * Replace abandoned serial dependency (#624) * Add build rules for MWLID extension * Support basic account management on FreeBSD (#619) * fix dependency between sshd and google-guest-agent-manager.service (#621) * Update go.mod dependencies (#622) * Fallback to shebang execution when running scripts (#618) * Update go dependencies (#620) * Make guest-agent buildable on FreeBSD (#617)

References

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