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CVE-2026-84303VulnerabilityPublished Updated

SUSE · Security update for warewulf4

Affects SUSESource GCVE Database

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Mentioned vulnerabilities

Authoritative record:CVE-2026-84303· Medium 6.3

Not known to be exploited · CVSS 6.3 Medium : upgrade SUSE to 1.83.1 when convenient.

Data as of 5 Nov 2026, 00:44 UTC

CVSS 4.0 base score
6.3Medium
How severe the flaw is on the 0–10 CVSS scale.
Patch
Available – fixed in 1.83.1
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 1 Sep 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 5 Nov 2026.

What to do

Upgrade grpc-go to 1.83.1.

Affected software

ProductAffectedFixed in
grpcgrpc-goAffected
  • <1.83.1
Fixed in
  • 1.83.1

AI-suggested

A security update for warewulf4 that updates the google.golang.org/grpc library is available and should be applied to remediate these vulnerabilities. No additional mitigation steps are indicated in the provided information.

Description

This security update for warewulf4 addresses two critical vulnerabilities in the google.golang.org/grpc library. The first vulnerability (CVE-2026-84445) involves a denial-of-service (DoS) condition caused by a crash when ':authority' and 'Host' headers are missing in gRPC-Go xDS servers. The second vulnerability (CVE-2026-84303) is an authorization bypass in the xDS RBAC HTTP filter due to case-insensitive header matching issues.

References

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