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CVE-2026-33810VulnerabilityPublished Updated

Red Hat Security Advisory: ignition security update

Affects Red Hat ignitionSource GCVE Database

0

Mentioned vulnerabilities

Authoritative record:CVE-2026-33810· High 7.5

Not known to be exploited · CVSS 7.5 High : upgrade Red Hat x509 to 1.26.2 soon.

Data as of 26 Oct 2026, 17:16 UTC

CVSS 3.1 base score
7.5High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.3% chance of exploitation in 30 days – higher than 27% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 1.26.2
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 8 Apr 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

Upgrade crypto/x509 to 1.26.2.

Affected software

ProductAffectedFixed in
Go standard librarycrypto/x509Affected
  • >=1.26.0-0 <1.26.2
Fixed in
  • 1.26.2
Gocrypto/x509pkg:golang/crypto/x509Other threatsAffected
  • >=1.26.0-0 <1.26.2
Fixed in
  • 1.26.2
Gogithub.com/golang/go/src/crypto/x509pkg:golang/github.com/golang/go/src/crypto/x509Other threatsAffected
  • =1.26.0-0
Fixed in–

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

Description

Ignition is a utility used to manipulate systems during the initramfs. This includes partitioning disks, formatting partitions, writing files (regular files, systemd units, etc.), and configuring users. On first boot, Ignition reads its configuration from a source of truth (remote URL, network metadata service, hypervisor bridge, etc.) and applies the configuration. Security Fix(es): * crypto/x509: golang: Go crypto/x509: Certificate validation bypass due to incorrect DNS constraint application (CVE-2026-33810) * golang.org/x/net/idna: golang: net/http: golang.org/x/net/idna: Privilege escalation via incorrect Punycode label processing (CVE-2026-39821) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

References

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