CVE-2026-13021

MEDIUMPre-NVD 4.34.3—
EchelonGraph scoreHIGH confidence

Score 4.3 from GitHub Security Advisory published 2026-06-24. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 4.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 4 sources updated this week
4.3
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 4.3Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Inappropriate implementation in DeviceBoundSessionCredentials in Google Chrome prior to 149.0.7827.197 allowed a remote attacker to bypass same origin policy via a crafted HTML page. (Chromium security severity: High)

CVSS v3
4.3
EG Score
4.3(high)
EPSS
4.0%
KEV
Not listed

Published

June 24, 2026

Last Modified

June 26, 2026

Advisory Details (2)

Auto-updated Jun 24, 2026
No patch confirmed yet.
generic

Chromium

https://issues.chromium.org/issues/511776603
generic

Chrome Releases: Stable Channel Update for Desktop

https://chromereleases.googleblog.com/2026/06/stable-channel-update-for-desktop_0482630350.html

Vendor Advisories for CVE-2026-13021(2)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 28× in last 7d / 46× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-07 06:20 UTCEG score recompute
  2. 2026-07-07 06:20 UTCVendor advisory
  3. 2026-07-07 06:20 UTCGHSA enrichment
  4. 2026-07-06 04:55 UTCEG score recompute
  5. 2026-07-06 04:55 UTCVendor advisory
  6. 2026-07-06 04:55 UTCGHSA enrichment
  7. 2026-07-06 02:23 UTCEPSS rescore
  8. 2026-07-05 03:26 UTCEG score recompute
  9. 2026-07-05 03:26 UTCVendor advisory
  10. 2026-07-05 03:26 UTCGHSA enrichment
  11. 2026-07-05 02:30 UTCEPSS rescore
  12. 2026-07-05 02:30 UTCEPSS rescore
  13. 2026-07-04 06:31 UTCEPSS rescore
  14. 2026-07-04 02:03 UTCEG score recompute
  15. 2026-07-04 02:03 UTCVendor advisory
  16. 2026-07-04 02:03 UTCGHSA enrichment
  17. 2026-07-03 00:37 UTCEG score recompute
  18. 2026-07-03 00:37 UTCVendor advisory
  19. 2026-07-03 00:37 UTCGHSA enrichment
  20. 2026-07-01 23:13 UTCEG score recompute
  21. 2026-07-01 23:13 UTCVendor advisory
  22. 2026-07-01 23:13 UTCGHSA enrichment
  23. 2026-07-01 15:06 UTCEPSS rescore
  24. 2026-07-01 15:06 UTCEPSS rescore
  25. 2026-06-30 23:22 UTCEPSS rescore
Show 21 more
  1. 2026-06-30 21:50 UTCEG score recompute
  2. 2026-06-30 21:50 UTCVendor advisory
  3. 2026-06-30 21:50 UTCGHSA enrichment
  4. 2026-06-29 20:27 UTCEG score recompute
  5. 2026-06-29 20:27 UTCVendor advisory
  6. 2026-06-29 20:27 UTCGHSA enrichment
  7. 2026-06-29 14:06 UTCEPSS rescore
  8. 2026-06-28 19:05 UTCEG score recompute
  9. 2026-06-28 19:05 UTCVendor advisory
  10. 2026-06-28 19:04 UTCGHSA enrichment
  11. 2026-06-28 14:07 UTCEPSS rescore
  12. 2026-06-28 04:56 UTCEPSS rescore
  13. 2026-06-28 04:56 UTCEPSS rescore
  14. 2026-06-27 17:40 UTCEG score recompute▲ 4.30
  15. 2026-06-27 17:40 UTCVendor advisory
  16. 2026-06-27 17:40 UTCGHSA enrichment
  17. 2026-06-27 03:08 UTCEPSS rescore
  18. 2026-06-25 13:49 UTCEPSS rescore
  19. 2026-06-24 22:03 UTCNVD updateCVSS v3 → 4.3 · severity → MEDIUM
  20. 2026-06-24 20:08 UTCEG score recompute
  21. 2026-06-24 20:03 UTCNVD updatefirst tracked

Frequently asked(5)

What is CVE-2026-13021?
CVE-2026-13021 is a medium vulnerability published on June 24, 2026. Inappropriate implementation in DeviceBoundSessionCredentials in Google Chrome prior to 149.0.7827.197 allowed a remote attacker to bypass same origin policy via a crafted HTML page. (Chromium security severity: High)
When was CVE-2026-13021 disclosed?
CVE-2026-13021 was first published in the National Vulnerability Database on June 24, 2026, with the most recent update on June 26, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-13021 actively exploited?
CVE-2026-13021 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 4.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-13021?
CVE-2026-13021 has a CVSS v3.1 base score of 4.3 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-13021?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-13021, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-13021

Explore →

Is Your Infrastructure Affected by CVE-2026-13021?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs