CVE-2026-12457

MEDIUMPre-NVD 4.24.2—
EchelonGraph scoreHIGH confidence

Score 4.2 from GitHub Security Advisory published 2026-06-17. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 4.2; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 4 sources updated this week
4.2
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 4.2Exploit: NoneExposed: 0

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

Inappropriate implementation in Extensions in Google Chrome prior to 149.0.7827.155 allowed a remote attacker who had compromised the renderer process to bypass site isolation via a crafted HTML page. (Chromium security severity: High)

CVSS v3
4.2
EG Score
4.2(high)
EPSS
3.4%
KEV
Not listed

Published

June 17, 2026

Last Modified

June 17, 2026

Advisory Details (2)

Auto-updated Jun 18, 2026
No patch confirmed yet.
generic

Chromium

https://issues.chromium.org/issues/517153117
generic

Chrome Releases: Stable Channel Update for Desktop

https://chromereleases.googleblog.com/2026/06/stable-channel-update-for-desktop_01750511403.html

Vendor Advisories for CVE-2026-12457(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 29× in last 7d / 86× 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. 2026-07-06 16:27 UTCEPSS rescore
  2. 2026-07-06 12:47 UTCEG score recompute
  3. 2026-07-06 12:47 UTCVendor advisory
  4. 2026-07-06 12:47 UTCGHSA enrichment
  5. 2026-07-06 02:23 UTCEPSS rescore
  6. 2026-07-05 09:59 UTCEG score recompute
  7. 2026-07-05 09:59 UTCVendor advisory
  8. 2026-07-05 09:58 UTCGHSA enrichment
  9. 2026-07-05 02:30 UTCEPSS rescore
  10. 2026-07-05 02:30 UTCEPSS rescore
  11. 2026-07-04 11:39 UTCEG score recompute
  12. 2026-07-04 11:39 UTCVendor advisory
  13. 2026-07-04 11:38 UTCGHSA enrichment
  14. 2026-07-04 06:31 UTCEPSS rescore
  15. 2026-07-03 13:20 UTCEG score recompute
  16. 2026-07-03 13:20 UTCVendor advisory
  17. 2026-07-03 13:20 UTCGHSA enrichment
  18. 2026-07-02 14:04 UTCEG score recompute
  19. 2026-07-02 14:04 UTCVendor advisory
  20. 2026-07-02 14:04 UTCGHSA enrichment
  21. 2026-07-01 15:45 UTCEG score recompute
  22. 2026-07-01 15:45 UTCVendor advisory
  23. 2026-07-01 15:45 UTCGHSA enrichment
  24. 2026-07-01 15:06 UTCEPSS rescore
  25. 2026-07-01 15:06 UTCEPSS rescore
Show 61 more
  1. 2026-06-30 23:22 UTCEPSS rescore
  2. 2026-06-30 17:25 UTCEG score recompute
  3. 2026-06-30 17:25 UTCVendor advisory
  4. 2026-06-30 17:24 UTCGHSA enrichment
  5. 2026-06-29 18:50 UTCEG score recompute
  6. 2026-06-29 18:50 UTCVendor advisory
  7. 2026-06-29 18:50 UTCGHSA enrichment
  8. 2026-06-29 14:06 UTCEPSS rescore
  9. 2026-06-28 20:31 UTCEG score recompute
  10. 2026-06-28 20:31 UTCVendor advisory
  11. 2026-06-28 20:31 UTCGHSA enrichment
  12. 2026-06-28 14:07 UTCEPSS rescore
  13. 2026-06-28 04:56 UTCEPSS rescore
  14. 2026-06-28 04:56 UTCEPSS rescore
  15. 2026-06-27 22:12 UTCEG score recompute
  16. 2026-06-27 22:12 UTCVendor advisory
  17. 2026-06-27 22:12 UTCGHSA enrichment
  18. 2026-06-27 03:08 UTCEPSS rescore
  19. 2026-06-26 23:51 UTCEG score recompute
  20. 2026-06-26 23:51 UTCVendor advisory
  21. 2026-06-26 23:50 UTCGHSA enrichment
  22. 2026-06-26 01:32 UTCEG score recompute
  23. 2026-06-26 01:32 UTCVendor advisory
  24. 2026-06-26 01:32 UTCGHSA enrichment
  25. 2026-06-25 13:49 UTCEPSS rescore
  26. 2026-06-25 03:13 UTCEG score recompute
  27. 2026-06-25 03:13 UTCVendor advisory
  28. 2026-06-25 03:13 UTCGHSA enrichment
  29. 2026-06-24 14:05 UTCEPSS rescore
  30. 2026-06-24 04:55 UTCEG score recompute
  31. 2026-06-24 04:55 UTCVendor advisory
  32. 2026-06-24 04:55 UTCGHSA enrichment
  33. 2026-06-23 21:32 UTCEPSS rescore
  34. 2026-06-23 06:37 UTCEG score recompute
  35. 2026-06-23 06:37 UTCVendor advisory
  36. 2026-06-23 06:36 UTCGHSA enrichment
  37. 2026-06-22 14:25 UTCEPSS rescore
  38. 2026-06-22 14:25 UTCEPSS rescore
  39. 2026-06-22 08:08 UTCEG score recompute
  40. 2026-06-22 08:08 UTCVendor advisory
  41. 2026-06-22 08:08 UTCGHSA enrichment
  42. 2026-06-22 08:02 UTCGHSA enrichment
  43. 2026-06-21 14:56 UTCEPSS rescore
  44. 2026-06-21 14:56 UTCEPSS rescore
  45. 2026-06-21 09:40 UTCEG score recompute
  46. 2026-06-21 09:40 UTCVendor advisory
  47. 2026-06-21 09:40 UTCGHSA enrichment
  48. 2026-06-21 01:59 UTCEPSS rescore
  49. 2026-06-21 01:59 UTCEPSS rescore
  50. 2026-06-20 11:21 UTCEG score recompute
  51. 2026-06-20 11:21 UTCVendor advisory
  52. 2026-06-20 11:20 UTCGHSA enrichment
  53. 2026-06-19 19:25 UTCEPSS rescore
  54. 2026-06-19 13:00 UTCEG score recompute
  55. 2026-06-19 13:00 UTCGHSA enrichment
  56. 2026-06-18 17:52 UTCEPSS rescore
  57. 2026-06-18 14:37 UTCEG score recompute
  58. 2026-06-18 14:37 UTCGHSA enrichment
  59. 2026-06-17 17:53 UTCEPSS rescore
  60. 2026-06-17 16:18 UTCEG score recompute
  61. 2026-06-17 15:50 UTCNVD updatefirst tracked

Frequently asked(5)

What is CVE-2026-12457?
CVE-2026-12457 is a medium vulnerability published on June 17, 2026. Inappropriate implementation in Extensions in Google Chrome prior to 149.0.7827.155 allowed a remote attacker who had compromised the renderer process to bypass site isolation via a crafted HTML page. (Chromium security severity: High)
When was CVE-2026-12457 disclosed?
CVE-2026-12457 was first published in the National Vulnerability Database on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-12457 actively exploited?
CVE-2026-12457 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 3.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-12457?
CVE-2026-12457 has a CVSS v3.1 base score of 4.2 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-12457?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-12457, 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-2026-12457

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