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CVE-2026-56857VulnerabilityPublished 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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Authoritative record:CVE-2026-56857· Critical 9.8

Not known to be exploited · CVSS 9.8 Critical : upgrade to 1.27.2 or 1.26.9 as a priority.

Data as of 29 Oct 2026, 10:37 UTC

CVSS 3.1 base score
9.8Critical
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.5% chance of exploitation in 30 days – higher than 46% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 1.27.2, 1.26.9
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 8 Oct 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 os and internal/syscall/windows to 1.27.2 or 1.26.9.

Affected software

ProductAffectedFixed in
Go standard libraryosAffected
  • >=1.27.0-0 <1.27.2
Fixed in
  • 1.27.2
Go standard libraryosAffected
  • <1.26.9
Fixed in
  • 1.26.9
Go standard libraryinternal/syscall/windowsAffected
  • >=1.27.0-0 <1.27.2
Fixed in
  • 1.27.2
Go standard libraryinternal/syscall/windowsAffected
  • <1.26.9
Fixed in
  • 1.26.9
Goospkg:golang/osOther threatsAffected
  • <1.26.9
  • >=1.27.0-0 <1.27.2
Fixed in
  • 1.26.9
  • 1.27.2
Gointernal/syscall/windowspkg:golang/internal/syscall/windowsOther threatsAffected
  • <1.26.9
  • >=1.27.0-0 <1.27.2
Fixed in
  • 1.26.9
  • 1.27.2

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

Description

Go ist eine quelloffene Programmiersprache.

References

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