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CVE-2026-56852VulnerabilityPublished Updated

Bundesamt für Sicherheit in der Informationstechnik IBM · Red Hat Enterprise Linux (golang.org/x/text): Schwachstelle ermöglicht Denial of Service

Affects Bundesamt für Sicherheit in der Informationstechnik IBMSource GCVE Database

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Authoritative record:CVE-2026-56852· High 7.5

Not known to be exploited · CVSS 7.5 High : upgrade to 0.39.0 soon.

Data as of 13 Nov 2026, 11:52 UTC

CVSS 3.1 base score
7.5High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.4% chance of exploitation in 30 days – higher than 41% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 0.39.0
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 21 Jul 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 13 Nov 2026.

What to do

Upgrade golang.org/x/text/unicode/norm to 0.39.0.

Affected software

ProductAffectedFixed in
golang.org/x/textgolang.org/x/text/unicode/normAffected
  • <0.39.0
Fixed in
  • 0.39.0
Gogolang.org/x/text/unicode/normpkg:golang/golang.org/x/text/unicode/normOther threatsAffected
  • <0.39.0
Fixed in
  • 0.39.0

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 released updated rhc packages that fix this vulnerability. Users should apply the security update RHSA-2026:69258 promptly to remediate the issue. Details and update instructions are available at https://access.redhat.com/articles/11258. No additional mitigation steps are required beyond applying the official patch.

Description

A denial of service vulnerability exists in the golang.org/x/text package used by the rhc client tool and daemon in Red Hat Enterprise Linux 8. This flaw can be triggered by invalid UTF-8 input, causing the affected service to become unavailable. Red Hat has issued an important security advisory with updates to address this issue in multiple RHEL 8 variants.

References

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