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CVE-2026-56859VulnerabilityPublished Updated

Red Hat Security Advisory: Red Hat Cost Management On-Premise container image update

Affects Red HatSource GCVE Database

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Authoritative record:CVE-2026-56859· High 7.5

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

Data as of 30 Oct 2026, 03:15 UTC

CVSS 3.1 base score
7.5High
How severe the flaw is on the 0–10 CVSS scale.
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 29 Oct 2026.

What to do

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

Affected software

ProductAffectedFixed in
Go standard libraryencoding/xmlAffected
  • >=1.27.0-0 <1.27.0-rc.3
Fixed in
  • 1.27.0-rc.3
Go standard libraryencoding/xmlAffected
  • >=1.26.0-0 <1.26.6
Fixed in
  • 1.26.6
Go standard libraryencoding/xmlAffected
  • <1.25.13
Fixed in
  • 1.25.13
Goencoding/xmlpkg:golang/encoding/xmlOther 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

Red Hat has provided an updated container image for Red Hat Cost Management On-Premise that includes the latest bug fixes and enhancements. However, no direct mitigation or patch for the underlying Go encoding/xml vulnerability currently meets Red Hat's criteria for ease of use, applicability, or stability. Users should deploy the updated container image from the Red Hat container registry using the "podman pull" command as recommended by Red Hat.

Description

A denial of service vulnerability exists in the Go encoding/xml package used by Red Hat Cost Management On-Premise. The DecodeElement function does not properly track recursion depth, which can lead to stack exhaustion when processing specially crafted XML input. This flaw can be exploited remotely to cause a denial of service in affected applications. Red Hat has released an updated container image for Red Hat Cost Management On-Premise that includes bug fixes and enhancements. No direct patch for the underlying Go package vulnerability is currently available or meets Red Hat's criteria for mitigation.

References

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