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VulnerabilityPublished

CVE-2026-111438: openGauss-server · Authentication Bypass Using an Alternate Path or Channel

Affects openGauss-serverSource CVE Database V5

0

Not known to be exploited · CVSS 6.5 Medium · fixed in 7.0.0 : update openGauss-server when convenient.

Data as of 26 Oct 2026, 17:16 UTC

CVSS 3.1 base score
6.5Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.3% chance of exploitation in 30 days – higher than 29% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CISA SSVC
Exploitation
No evidence of active exploitation and no public proof of concept
Automatable
Attackers cannot reliably automate steps 1–4 of the kill chain
Technical impact
Total control over the software or total information disclosure

CISA SSVC assessment, 2026-10-19.

Patch
Available – fixed in 7.0.0
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 19 Oct 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: 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 26 Oct 2026.

What to do

Affected software

ProductAffectedFixed in
openGauss-serveropenGauss-serverAffected
  • 3.0.0-3.0.5 – 6.0.0-RC1
6 affected builds
Fixed in–

AI-suggested

This vulnerability is fixed in openGauss-server version 7.0.0-LTS. Users should upgrade to this version or later to ensure the internal connection validation for replication senders is enforced. No other mitigation or workaround is indicated by the vendor advisory.

Description

CVE-2026-111438 is an authentication bypass vulnerability in openGauss-server affecting versions 3.0.0 through 6.0.6 and certain release candidates. The flaw exists in the handling of replication connections for HADR/SW senders, where internal connection checks are bypassed, allowing unauthorized replication connections from non-internal networks. This enables attackers to bypass pg_hba access control policies and potentially read backup and log data via the replication protocol. The issue is fixed in version 7.0.0-LTS by enforcing internal connection validation for replication senders.

References

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