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CVE-2026-33818VulnerabilityPublished Updated

Bundesamt für Sicherheit in der Informationstechnik Amazon · Golang Go: Mehrere Schwachstellen

Affects Bundesamt für Sicherheit in der Informationstechnik AmazonSource 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 1.27.0-rc.3 : patch Bundesamt für Sicherheit in der Informationstechnik Amazon soon.

Data as of 9 Nov 2026, 13:48 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
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 9 Nov 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

Upgrade affected Go versions to 1.26.6 or later, as this version contains the official fix for the vulnerabilities. Follow vendor advisories such as the Red Hat security advisory RHSA-2026:56223 for detailed update instructions. No additional mitigation steps are indicated beyond applying the official patch.

Description

Multiple vulnerabilities affect the Go programming language versions prior to 1.26.6. These include issues such as privilege escalation via incorrect Punycode label processing. A fix is available in version 1.26.6. The vulnerabilities have been rated as important by Red Hat and are addressed in their security advisories.

References

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