CVE-2026-111943: go standard library crypto/x509

CVSS: UnknownReceived
AliasesRUSTSEC-2026-0383CGA-32jh-59ph-xj58CGA-34cw-42xw-mvvg
Published 21-10-2026Last modified 21-10-2026
Open JSON

Vulnerability summary

CVE-2026-111943 is a vulnerability in go standard library crypto/x509 with no CVSS score yet. EPSS estimates a 0.14% chance of exploitation in the next 30 days, higher than 3.3% of scored vulnerabilities.

Overall risk
0/100
0100
Minimal · default modelHow is this calculated?
CVSS score
Not scored
010
No CVSS score recorded
EPSS score
0.14%
0%100%
Low · Change unavailable
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 21-10-2026
    PublishedVulnerability first disclosed.
  2. 21-10-2026
    Last modifiedVulnerability information updated.

Description

On most platforms, Go uses the given system root certificates. However, in some narrower cases, the system trust stores may not be updated without further action. To defend against the narrower set of cases that may remain affected, a denylist was added in crypto/x509 to return an error when calling Verify with any of the known intermediate certificates that are no longer considered to be trustworthy.

CVSS metrics

Risk metrics not yet published.

EPSS trend

Probability

0.14%

Chance of exploitation in the next 30 days

Percentile

3%

Versus all other CVEs

30-day change

Change unavailable

Change unavailable

21-10-202621-10-2026
EPSS score
0.14%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Chainguard200 products
  • acm-controllerAll versions (No fix recorded)
  • actions-runner-controllerAll versions (No fix recorded) | < 0.15.0-r4
  • actions-runner-controller-fipsAll versions (No fix recorded) | < 0.15.0-r4
  • agentbeat-fips-8.19All versions (No fix recorded)
  • amazon-cloudwatch-agentAll versions (No fix recorded) | < 1.300074.0-r3

1 vendor · 200 products · Showing 200 of 2752. Use Open JSON for the complete list.

References

16 links
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