CVE-2026-111943

waiting for further signals

EUVD-2026-106926 ↗

no check availablenot proven exploitable

cve.orgpublic pockev

Go standard library crypto/x509 < 1.26.10; >= 1.27.0-0, < 1.27.3

fixed in 1.26.10, 1.27.3

ETK-2026-2258, permanent identifier

3h 10msince last run

9mAI analysis

timeline

0 = trigger signal

trigger signal (cve.org) +0hwaiting for further signals+1h05m

+2h

+4h

+6h

+8h

+10h

+12h

description

Go crypto/x509 before 1.26.10 or 1.27.3 can continue to accept certificate chains involving intermediates that should no longer be trusted. An attacker may be able to rely on such a chain where the system trust store has not incorporated the relevant trust removal and the application performs certificate verification.

mitigation

Upgrade Go to 1.26.10 or 1.27.3. Ensure systems also keep their operating-system certificate trust stores current.

fixed in 1.26.10, 1.27.3

check

exploit

automation

contextual

auth required

–

EPSS

–

agent run time

cve.org record, t = 0

2026-10-21 00:52Z

Δ to public poc

–

Δ to kev

–

outcome

Contextual: an exploit technique exists, but no deterministic check could cover this one.

source signals

Public signals that triggered or updated the pipeline. These are inputs for the deltas above.

2026-10-21 00:52Z
cve_org: trigger signal, started the run
https://www.cve.org/CVERecord?id=CVE-2026-111943

this entry in the feed

GET /api/v1/feed/CVE-2026-111943

{
  "etk_id": "ETK-2026-2258",
  "cve_id": "CVE-2026-111943",
  "display_id": "CVE-2026-111943",
  "ghsa_id": null,
  "euvd_id": "EUVD-2026-106926",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Certificate trust revocation gap in Go crypto/x509",
  "summary": "Go crypto/x509 before 1.26.10 or 1.27.3 can continue to accept certificate chains involving intermediates that should no longer be trusted. An attacker may be able to rely on such a chain where the system trust store has not incorporated the relevant trust removal and the application performs certificate verification.",
  "mitigation": "Upgrade Go to 1.26.10 or 1.27.3. Ensure systems also keep their operating-system certificate trust stores current.",
  "vendor": "Go standard library",
  "product": "crypto/x509",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 0, < 1.26.10",
        ">= 1.27.0-0, < 1.27.3"
      ],
      "ecosystem": null,
      "fixed_versions": [
        "1.26.10",
        "1.27.3"
      ],
      "package_name": "crypto/x509",
      "purl": null
    }
  ],
  "cwes": null,
  "cvss_score": null,
  "cvss_src": null,
  "cvss_vector": null,
  "epss_score": null,
  "epss_percentile": null,
  "epss_asof": null,
  "automation": "contextual",
  "check": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": 9.180237816666667,
  "t0_at": "2026-10-21T00:52:18.359000+00:00",
  "signals": {
    "trigger_signal": {
      "at": "2026-10-21T00:52:18.359000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-10-21T00:52:18.359000+00:00",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-111943"
    }
  }
}

published 2026-10-21 01:48Z
last change 2026-10-21 03:59Z

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