CVE-2026-78947

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreHIGH confidence

Score 6.5 from GitHub Security Advisory published 2026-08-25. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 4 sources updated this week
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.5Exploit: None knownExposed: 0

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

Incomplete cleanup in Chromium in Google Chrome prior to 152.0.7977.65 allowed a remote attacker leveraging social engineering to bypass web origin policy via a crafted Chrome extension. (Chromium security severity: Low)

CVSS v3
6.5
Vendor severity
LOWper Google (Chromium)Vendor's own band, not a CVSS rating — advisory text: (Chromium security severity: Low)
EG Score
6.5(high)
EG Risk
29(Track)
EG Risk 29/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity65% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
20%
KEV
Not listed

Published

August 25, 2026

Last Modified

August 28, 2026

Advisory Details (2)

Auto-updated Aug 27, 2026
No patch confirmed yet.
generic

Chromium

https://issues.chromium.org/issues/523313378
generic

Chrome Releases: Stable Channel Update for Desktop

https://chromereleases.googleblog.com/2026/08/stable-channel-update-for-desktop_0256176589.html

Vendor Advisories for CVE-2026-78947(1)

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

Affected Packages

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFixed inDependents
chromium113.0.5672.126-1 ... 152.0.7977.64-1 (412 versions)152.0.7977.75-1~deb12u1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
chromium138.0.7204.183-1 ... 152.0.7977.75-1~deb12u1 (178 versions)152.0.7977.75-1~deb13u1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
chromium138.0.7204.183-1 ... 152.0.7977.75-1~deb13u1 (180 versions)——

Weakness Classification(1)

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

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 23× 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. 2026-09-18 22:20 UTCEG score recompute
  2. 2026-09-18 22:20 UTCVendor advisory
  3. 2026-09-18 22:20 UTCGHSA enrichment
  4. 2026-09-18 19:28 UTCEPSS rescore
  5. 2026-09-17 21:03 UTCEG score recompute
  6. 2026-09-17 21:03 UTCVendor advisory
  7. 2026-09-17 21:03 UTCGHSA enrichment
  8. 2026-09-16 19:16 UTCEG score recompute
  9. 2026-09-16 19:16 UTCVendor advisory
  10. 2026-09-16 19:16 UTCGHSA enrichment
  11. 2026-09-16 14:08 UTCEPSS rescore
  12. 2026-09-16 05:15 UTCEPSS rescore
  13. 2026-09-15 16:04 UTCEG score recompute
  14. 2026-09-15 16:04 UTCVendor advisory
  15. 2026-09-15 16:04 UTCGHSA enrichment
  16. 2026-09-15 03:12 UTCEPSS rescore
  17. 2026-09-15 03:12 UTCEPSS rescore
  18. 2026-09-14 14:46 UTCEG score recompute
  19. 2026-09-14 14:46 UTCVendor advisory
  20. 2026-09-14 14:46 UTCGHSA enrichment
  21. 2026-09-13 13:30 UTCEG score recompute
  22. 2026-09-13 13:30 UTCVendor advisory
  23. 2026-09-13 13:30 UTCGHSA enrichment
  24. 2026-09-12 12:13 UTCEG score recompute
  25. 2026-09-12 12:13 UTCVendor advisory
Show 61 more
  1. 2026-09-12 12:13 UTCGHSA enrichment
  2. 2026-09-11 14:53 UTCEPSS rescore
  3. 2026-09-11 14:53 UTCEPSS rescore
  4. 2026-09-11 10:56 UTCEG score recompute
  5. 2026-09-11 10:56 UTCGHSA enrichment
  6. 2026-09-10 09:18 UTCGHSA enrichment
  7. 2026-09-09 08:01 UTCEG score recompute
  8. 2026-09-09 08:01 UTCGHSA enrichment
  9. 2026-09-08 22:01 UTCEPSS rescore
  10. 2026-09-08 06:45 UTCEG score recompute
  11. 2026-09-08 06:45 UTCVendor advisory
  12. 2026-09-08 06:45 UTCGHSA enrichment
  13. 2026-09-07 05:28 UTCEG score recompute
  14. 2026-09-07 05:28 UTCVendor advisory
  15. 2026-09-07 05:28 UTCGHSA enrichment
  16. 2026-09-06 13:48 UTCEPSS rescore
  17. 2026-09-06 03:59 UTCEG score recompute
  18. 2026-09-06 03:59 UTCVendor advisory
  19. 2026-09-06 03:59 UTCGHSA enrichment
  20. 2026-09-05 02:43 UTCEG score recompute
  21. 2026-09-05 02:43 UTCVendor advisory
  22. 2026-09-05 02:42 UTCGHSA enrichment
  23. 2026-09-04 05:07 UTCEPSS rescore
  24. 2026-09-04 01:24 UTCVendor advisory
  25. 2026-09-04 01:24 UTCGHSA enrichment
  26. 2026-09-03 00:08 UTCEG score recompute
  27. 2026-09-03 00:08 UTCVendor advisory
  28. 2026-09-03 00:08 UTCGHSA enrichment
  29. 2026-09-02 14:12 UTCEPSS rescore
  30. 2026-09-01 22:49 UTCEG score recompute
  31. 2026-09-01 22:49 UTCVendor advisory
  32. 2026-09-01 22:49 UTCGHSA enrichment
  33. 2026-09-01 13:54 UTCEPSS rescore
  34. 2026-09-01 04:40 UTCEPSS rescore
  35. 2026-09-01 04:40 UTCEPSS rescore
  36. 2026-08-31 21:32 UTCVendor advisory
  37. 2026-08-31 21:32 UTCGHSA enrichment
  38. 2026-08-30 20:16 UTCEG score recompute
  39. 2026-08-30 20:16 UTCVendor advisory
  40. 2026-08-30 20:16 UTCGHSA enrichment
  41. 2026-08-30 19:18 UTCEPSS rescore
  42. 2026-08-30 19:17 UTCEPSS rescore
  43. 2026-08-30 01:22 UTCEPSS rescore
  44. 2026-08-29 19:00 UTCEG score recompute
  45. 2026-08-29 19:00 UTCVendor advisory
  46. 2026-08-29 19:00 UTCGHSA enrichment
  47. 2026-08-28 21:42 UTCEPSS rescore
  48. 2026-08-28 17:42 UTCEG score recompute
  49. 2026-08-28 17:42 UTCVendor advisory
  50. 2026-08-28 17:41 UTCGHSA enrichment
  51. 2026-08-27 17:32 UTCGHSA enrichment
  52. 2026-08-27 17:10 UTCEG score recompute▲ 1.10
  53. 2026-08-27 17:09 UTCGHSA enrichment
  54. 2026-08-27 16:43 UTCMITRE cvelistV5CVSS v3 → 6.5 · severity → MEDIUM
  55. 2026-08-27 14:25 UTCEPSS rescore
  56. 2026-08-26 16:37 UTCEG score recompute
  57. 2026-08-26 16:37 UTCGHSA enrichment
  58. 2026-08-26 14:47 UTCEPSS rescore
  59. 2026-08-25 21:25 UTCNVD update
  60. 2026-08-25 20:26 UTCEG score recompute
  61. 2026-08-25 20:25 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-78947?
CVE-2026-78947 is a medium vulnerability published on August 25, 2026. Incomplete cleanup in Chromium in Google Chrome prior to 152.0.7977.65 allowed a remote attacker leveraging social engineering to bypass web origin policy via a crafted Chrome extension. (Chromium security severity: Low)
When was CVE-2026-78947 disclosed?
CVE-2026-78947 was first published in the National Vulnerability Database on August 25, 2026, with the most recent update on August 28, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-78947 actively exploited?
CVE-2026-78947 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 80.0% of all scored CVEs.
What is the CVSS score of CVE-2026-78947?
CVE-2026-78947 has a CVSS v3.1 base score of 6.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-78947?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-78947, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-78947

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