CVE-2026-78940

MEDIUMPre-NVD 4.34.3—
EchelonGraph scoreMEDIUM confidence

Score 4.3 from GitHub Security Advisory published 2026-08-25. 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
4.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 4.3Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Improper initialization in Network in Google Chrome prior to 152.0.7977.65 allowed a remote attacker to bypass web origin policy via a crafted HTML page. (Chromium security severity: Medium)

CVSS v3
4.3
Vendor severity
MEDIUMper Google (Chromium)Vendor's own band, not a CVSS rating — advisory text: (Chromium security severity: Medium)
EG Score
4.3MEDIUMmedium confidence
EG Risk
19
EG Risk 19/100CISA SSVC

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
Severity43% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at every mission impact level.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.3%
EPSS %ILE
23rd
KEV
Not listed

CISA SSVCTrack at every mission impact level.

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 25, 2026

Last Modified

September 17, 2026

Advisory Details (2)

Auto-updated Aug 27, 2026
Patch available.
generic

Chromium

https://issues.chromium.org/issues/511819962
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-2026-78940(2)

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 rangeFix by version rangeDependents
chromium113.0.5672.126-1 ... 152.0.7977.64-1 (412 versions)
  • every version up to 152.0.7977.75-1~deb12u1: fixed in 152.0.7977.75-1~deb12u1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
chromium138.0.7204.183-1 ... 152.0.7977.75-1~deb12u1 (178 versions)
  • every version up to 152.0.7977.75-1~deb13u1: fixed in 152.0.7977.75-1~deb13u1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
chromium138.0.7204.183-1 ... 151.0.7922.71-1~deb13u1 (176 versions)
  • every version up to 152.0.7977.64-1: fixed in 152.0.7977.64-1
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 28× in last 7d / 115× 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.

Showing the most recent 100 of 179 total refreshes for this CVE.

  1. 2026-10-10 20:00 UTCEPSS rescore
  2. 2026-10-10 11:28 UTCEG score recompute
  3. 2026-10-10 11:28 UTCVendor advisory
  4. 2026-10-10 11:28 UTCGHSA enrichment
  5. 2026-10-09 20:07 UTCEPSS rescore
  6. 2026-10-09 03:55 UTCEG score recompute
  7. 2026-10-09 03:55 UTCVendor advisory
  8. 2026-10-09 03:55 UTCGHSA enrichment
  9. 2026-10-08 17:13 UTCEPSS rescore
  10. 2026-10-08 02:31 UTCEG score recompute
  11. 2026-10-08 02:31 UTCVendor advisory
  12. 2026-10-08 02:30 UTCGHSA enrichment
  13. 2026-10-07 23:48 UTCEPSS rescore
  14. 2026-10-07 00:13 UTCEG score recompute
  15. 2026-10-07 00:13 UTCVendor advisory
  16. 2026-10-07 00:13 UTCGHSA enrichment
  17. 2026-10-06 15:18 UTCEPSS rescore
  18. 2026-10-06 01:59 UTCEG score recompute
  19. 2026-10-06 01:59 UTCVendor advisory
  20. 2026-10-06 01:59 UTCGHSA enrichment
  21. 2026-10-05 17:43 UTCEPSS rescore
  22. 2026-10-05 01:26 UTCEG score recompute
  23. 2026-10-05 01:26 UTCVendor advisory
  24. 2026-10-05 01:26 UTCGHSA enrichment
  25. 2026-10-04 23:22 UTCEPSS rescore
Show 75 more
  1. 2026-10-04 03:12 UTCEG score recompute
  2. 2026-10-04 03:12 UTCVendor advisory
  3. 2026-10-04 03:12 UTCGHSA enrichment
  4. 2026-10-03 14:26 UTCEPSS rescore
  5. 2026-10-03 04:59 UTCEG score recompute
  6. 2026-10-03 04:59 UTCVendor advisory
  7. 2026-10-03 04:59 UTCGHSA enrichment
  8. 2026-10-02 06:26 UTCEG score recompute
  9. 2026-10-02 06:26 UTCVendor advisory
  10. 2026-10-02 06:26 UTCGHSA enrichment
  11. 2026-10-01 19:50 UTCEPSS rescore
  12. 2026-10-01 05:35 UTCEG score recompute
  13. 2026-10-01 05:35 UTCVendor advisory
  14. 2026-10-01 05:35 UTCGHSA enrichment
  15. 2026-09-30 06:33 UTCEG score recompute
  16. 2026-09-30 06:33 UTCVendor advisory
  17. 2026-09-30 06:33 UTCGHSA enrichment
  18. 2026-09-29 15:24 UTCEPSS rescore
  19. 2026-09-28 21:26 UTCEG score recompute
  20. 2026-09-28 21:26 UTCVendor advisory
  21. 2026-09-28 21:26 UTCGHSA enrichment
  22. 2026-09-28 13:52 UTCEPSS rescore
  23. 2026-09-27 20:06 UTCEG score recompute
  24. 2026-09-27 20:06 UTCVendor advisory
  25. 2026-09-27 20:06 UTCGHSA enrichment
  26. 2026-09-27 13:48 UTCEPSS rescore
  27. 2026-09-26 21:50 UTCEG score recompute
  28. 2026-09-26 21:50 UTCVendor advisory
  29. 2026-09-26 21:50 UTCGHSA enrichment
  30. 2026-09-26 15:59 UTCEPSS rescore
  31. 2026-09-26 00:28 UTCEPSS rescore
  32. 2026-09-25 10:20 UTCEG score recompute
  33. 2026-09-25 10:20 UTCGHSA enrichment
  34. 2026-09-24 14:04 UTCEPSS rescore
  35. 2026-09-24 12:05 UTCEG score recompute
  36. 2026-09-24 12:05 UTCVendor advisory
  37. 2026-09-24 12:05 UTCGHSA enrichment
  38. 2026-09-23 17:54 UTCEPSS rescore
  39. 2026-09-23 13:51 UTCEG score recompute
  40. 2026-09-23 13:51 UTCVendor advisory
  41. 2026-09-23 13:51 UTCGHSA enrichment
  42. 2026-09-22 16:01 UTCEPSS rescore
  43. 2026-09-22 15:36 UTCEG score recompute
  44. 2026-09-22 15:36 UTCVendor advisory
  45. 2026-09-22 15:36 UTCGHSA enrichment
  46. 2026-09-21 21:09 UTCEPSS rescore
  47. 2026-09-21 17:22 UTCEG score recompute
  48. 2026-09-21 17:22 UTCVendor advisory
  49. 2026-09-21 17:22 UTCGHSA enrichment
  50. 2026-09-20 20:16 UTCEPSS rescore
  51. 2026-09-20 18:12 UTCVendor advisory
  52. 2026-09-20 18:12 UTCGHSA enrichment
  53. 2026-09-19 19:47 UTCEG score recompute
  54. 2026-09-19 19:47 UTCVendor advisory
  55. 2026-09-19 19:47 UTCGHSA enrichment
  56. 2026-09-18 21:33 UTCEG score recompute
  57. 2026-09-18 21:33 UTCVendor advisory
  58. 2026-09-18 21:33 UTCGHSA enrichment
  59. 2026-09-18 19:28 UTCEPSS rescore
  60. 2026-09-17 22:48 UTCVendor advisory
  61. 2026-09-17 22:48 UTCGHSA enrichment
  62. 2026-09-17 22:29 UTCEG score recompute
  63. 2026-09-17 22:29 UTCVendor advisory
  64. 2026-09-17 22:29 UTCGHSA enrichment
  65. 2026-09-17 10:13 UTCEG score recompute
  66. 2026-09-17 10:13 UTCVendor advisory
  67. 2026-09-17 10:13 UTCGHSA enrichment
  68. 2026-09-16 14:08 UTCEPSS rescore
  69. 2026-09-16 11:59 UTCEG score recompute
  70. 2026-09-16 11:59 UTCVendor advisory
  71. 2026-09-16 11:59 UTCGHSA enrichment
  72. 2026-09-16 05:15 UTCEPSS rescore
  73. 2026-09-15 13:45 UTCEG score recompute
  74. 2026-09-15 13:45 UTCVendor advisory
  75. 2026-09-15 13:45 UTCGHSA enrichment

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-78940?
CVE-2026-78940 is a medium vulnerability published on August 25, 2026. Improper initialization in Network in Google Chrome prior to 152.0.7977.65 allowed a remote attacker to bypass web origin policy via a crafted HTML page. (Chromium security severity: Medium)
When was CVE-2026-78940 disclosed?
CVE-2026-78940 was first published on August 25, 2026, with the most recent update on September 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-78940 actively exploited?
CVE-2026-78940 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (23rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-78940?
CVE-2026-78940 has a CVSS v3.1 base score of 4.3 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-78940?
A fix for CVE-2026-78940 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-78940 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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