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CVE-2026-33818VulnerabilityPublished Updated

Red Hat Bug Fix Advisory: zero trust workload identity manager for Red Hat OpenShift 1.0.4

Affects Red HatSource GCVE Database

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Mentioned vulnerabilities

Authoritative record:CVE-2026-33818· High 7.5

Not known to be exploited · CVSS 7.5 High · fixed in Red Hat package updates : patch Red Hat asn1 soon.

Data as of 30 Oct 2026, 21:36 UTC

CVSS 3.1 base score
7.5High
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CISA-ADPCVSS 3.17.5
EPSS
0.5% chance of exploitation in 30 days – higher than 47% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 1.27.0-rc.3, 1.26.6, 1.25.13
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 13 Aug 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 30 Oct 2026.

What to do

Upgrade encoding/asn1 to 1.27.0-rc.3, 1.26.6 or 1.25.13.

Affected software

ProductAffectedFixed in
Go standard libraryencoding/asn1Affected
  • >=1.27.0-0 <1.27.0-rc.3
Fixed in
  • 1.27.0-rc.3
Go standard libraryencoding/asn1Affected
  • >=1.26.0-0 <1.26.6
Fixed in
  • 1.26.6
Go standard libraryencoding/asn1Affected
  • <1.25.13
Fixed in
  • 1.25.13
Goencoding/asn1pkg:golang/encoding/asn1Other threatsAffected
  • <1.25.13
  • >=1.26.0-0 <1.26.6
  • >=1.27.0-0 <1.27.0-rc.3
Fixed in
  • 1.25.13
  • 1.26.6
  • 1.27.0-rc.3

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

AI-suggested

Before installing the Zero Trust Workload Identity Manager operator, ensure all previously released errata relevant to your system are applied. If the operator's approval policy is set to 'Automatic' (default), upgrades will be applied automatically when new versions are available, requiring no further action. If set to 'Manual', you must manually approve operator upgrades. Follow Red Hat's security bulletins and advisories for detailed mitigation procedures and upgrade instructions.

Description

A high-severity vulnerability (CVE-2026-111943) affects the Go crypto/x509 package used in the Zero Trust Workload Identity Manager (ZTWIM) for Red Hat OpenShift. The flaw allows improper certificate validation, enabling trust in intermediate certificates from compromised Certificate Authorities. This can lead to man-in-the-middle attacks where attackers impersonate legitimate servers during secure communications. The vulnerability impacts Go-based clients and servers relying on standard TLS certificate verification. The Zero Trust Workload Identity Manager 1.0.4 is generally available, and Red Hat provides upgrade paths for the operator.

References

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