CVE-2026-102309

CRITICALPre-NVD 9.69.6
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

Score 9.6 from GitHub Security Advisory (severity: CRITICAL) published 2026-09-29. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 9.6; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: CISA-ADP (Vulnrichment) CVSS v3.1, EPSS, GitHub Security Advisory

Also known asEUVD-2026-89388 (ENISA EUVD) · GHSA-jvcr-f7jv-xq3j (GitHub Security Advisories)Source: ENISA EUVD

9.6EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 9.6Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Use after free in FullScreen in Google Chrome prior to 154.0.8037.92 allowed a remote attacker to execute arbitrary code outside the sandbox via a crafted HTML page. (Chromium security severity: High)

CVSS v3
9.6
Vendor severity
HIGHper Google (Chromium)Vendor's own band, not a CVSS rating — advisory text: (Chromium security severity: High)
EG Score
9.6CRITICALmedium confidence
EG Risk
43
EG Risk 43/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity96% × 45%
Impact severity (EG Severity): CVSS 9.6 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.3% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.3%
EPSS %ILE
25th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (9.6): severity, escalated by confirmed exploitation. This CVE's 9.6 is its impact severity (EG Severity), not escalated.

EG Severity
9.6 CRITICALCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.3% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-12). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Track* at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).

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

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

September 29, 2026

Last Modified

September 30, 2026

Advisory Details (2)

Auto-updated Oct 2, 2026
Patch available.

Vendor Advisories for CVE-2026-102309(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 ... 154.0.8037.57-1~deb13u1 (428 versions)
  • every version up to 154.0.8037.92-1~deb12u1: fixed in 154.0.8037.92-1~deb12u1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
chromium138.0.7204.183-1 ... 154.0.8037.92-1~deb12u1 (194 versions)
  • every version up to 154.0.8037.92-1~deb13u1: fixed in 154.0.8037.92-1~deb13u1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
chromium138.0.7204.183-1 ... 154.0.8037.92-1~deb13u1 (195 versions)
  • every version up to 154.0.8037.92-1: fixed in 154.0.8037.92-1
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 18× in last 7d / 76× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed its CVE.org record (CNA or CISA ADP). An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). "EchelonGraph re-scored" is our own recompute of this CVE's score, not an update from a source, and is not counted in the refreshes above. Most recent first.

Showing the most recent 100 of 229 rows on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 129 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-13 16:50 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  2. 2026-11-13 08:49 UTCEchelonGraph re-scored
  3. 2026-11-13 08:49 UTCGHSA enrichmentGHSA-jvcr-f7jv-xq3j · GitHub severity CRITICAL · GitHub CVSS 9.6
  4. 2026-11-12 16:32 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  5. 2026-11-12 09:39 UTCEchelonGraph re-scored
  6. 2026-11-12 09:38 UTCGHSA enrichmentGHSA-jvcr-f7jv-xq3j · GitHub severity CRITICAL · GitHub CVSS 9.6
  7. 2026-11-11 16:37 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  8. 2026-11-11 10:30 UTCEchelonGraph re-scored
  9. 2026-11-11 10:30 UTCVendor advisory
  10. 2026-11-11 10:30 UTCGHSA enrichmentGHSA-jvcr-f7jv-xq3j · GitHub severity CRITICAL · GitHub CVSS 9.6
  11. 2026-11-10 16:41 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  12. 2026-11-10 11:20 UTCEchelonGraph re-scored
  13. 2026-11-10 11:20 UTCGHSA enrichmentGHSA-jvcr-f7jv-xq3j · GitHub severity CRITICAL · GitHub CVSS 9.6
  14. 2026-11-09 16:33 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  15. 2026-11-09 12:12 UTCEchelonGraph re-scored
  16. 2026-11-09 12:12 UTCVendor advisory
  17. 2026-11-09 12:12 UTCGHSA enrichmentGHSA-jvcr-f7jv-xq3j · GitHub severity CRITICAL · GitHub CVSS 9.6
  18. 2026-11-08 16:37 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  19. 2026-11-08 13:03 UTCEchelonGraph re-scored
  20. 2026-11-08 13:03 UTCVendor advisory
  21. 2026-11-08 13:03 UTCGHSA enrichmentGHSA-jvcr-f7jv-xq3j · GitHub severity CRITICAL · GitHub CVSS 9.6
  22. 2026-11-07 16:37 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  23. 2026-11-07 13:54 UTCEchelonGraph re-scored
  24. 2026-11-07 13:54 UTCVendor advisory
  25. 2026-11-07 13:54 UTCGHSA enrichmentGHSA-jvcr-f7jv-xq3j · GitHub severity CRITICAL · GitHub CVSS 9.6
Show 75 more
  1. 2026-11-06 16:35 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  2. 2026-11-06 14:46 UTCEchelonGraph re-scored
  3. 2026-11-06 14:46 UTCVendor advisory
  4. 2026-11-06 14:46 UTCGHSA enrichmentGHSA-jvcr-f7jv-xq3j · GitHub severity CRITICAL · GitHub CVSS 9.6
  5. 2026-11-05 16:36 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  6. 2026-11-05 15:38 UTCEchelonGraph re-scored
  7. 2026-11-05 15:38 UTCVendor advisory
  8. 2026-11-05 15:38 UTCGHSA enrichmentGHSA-jvcr-f7jv-xq3j · GitHub severity CRITICAL · GitHub CVSS 9.6
  9. 2026-11-04 16:34 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  10. 2026-11-04 16:29 UTCVendor advisory
  11. 2026-11-04 16:29 UTCGHSA enrichmentGHSA-jvcr-f7jv-xq3j · GitHub severity CRITICAL · GitHub CVSS 9.6
  12. 2026-11-03 17:20 UTCEchelonGraph re-scored
  13. 2026-11-03 17:20 UTCVendor advisory
  14. 2026-11-03 17:20 UTCGHSA enrichmentGHSA-jvcr-f7jv-xq3j · GitHub severity CRITICAL · GitHub CVSS 9.6
  15. 2026-11-03 16:45 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  16. 2026-11-02 18:12 UTCEchelonGraph re-scored
  17. 2026-11-02 18:12 UTCVendor advisory
  18. 2026-11-02 18:11 UTCGHSA enrichmentGHSA-jvcr-f7jv-xq3j · GitHub severity CRITICAL · GitHub CVSS 9.6
  19. 2026-11-02 16:43 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  20. 2026-11-01 18:58 UTCEchelonGraph re-scored
  21. 2026-11-01 18:58 UTCVendor advisory
  22. 2026-11-01 18:58 UTCGHSA enrichmentGHSA-jvcr-f7jv-xq3j · GitHub severity CRITICAL · GitHub CVSS 9.6
  23. 2026-11-01 16:33 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  24. 2026-10-31 19:50 UTCEchelonGraph re-scored
  25. 2026-10-31 19:50 UTCVendor advisory
  26. 2026-10-31 19:50 UTCGHSA enrichmentGHSA-jvcr-f7jv-xq3j · GitHub severity CRITICAL · GitHub CVSS 9.6
  27. 2026-10-31 16:31 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  28. 2026-10-30 20:42 UTCEchelonGraph re-scored
  29. 2026-10-30 20:42 UTCVendor advisory
  30. 2026-10-30 20:42 UTCGHSA enrichmentGHSA-jvcr-f7jv-xq3j · GitHub severity CRITICAL · GitHub CVSS 9.6
  31. 2026-10-30 16:33 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  32. 2026-10-29 21:34 UTCEchelonGraph re-scored
  33. 2026-10-29 21:34 UTCVendor advisory
  34. 2026-10-29 21:34 UTCGHSA enrichmentGHSA-jvcr-f7jv-xq3j · GitHub severity CRITICAL · GitHub CVSS 9.6
  35. 2026-10-29 16:32 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  36. 2026-10-29 06:18 UTCEchelonGraph re-scored
  37. 2026-10-29 06:18 UTCGHSA enrichmentGHSA-jvcr-f7jv-xq3j · GitHub severity CRITICAL · GitHub CVSS 9.6
  38. 2026-10-28 16:31 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  39. 2026-10-28 07:10 UTCEchelonGraph re-scored
  40. 2026-10-28 07:10 UTCVendor advisory
  41. 2026-10-28 07:10 UTCGHSA enrichmentGHSA-jvcr-f7jv-xq3j · GitHub severity CRITICAL · GitHub CVSS 9.6
  42. 2026-10-27 16:31 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  43. 2026-10-27 08:01 UTCEchelonGraph re-scored
  44. 2026-10-27 08:01 UTCVendor advisory
  45. 2026-10-27 08:01 UTCGHSA enrichmentGHSA-jvcr-f7jv-xq3j · GitHub severity CRITICAL · GitHub CVSS 9.6
  46. 2026-10-26 16:30 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  47. 2026-10-26 06:30 UTCEchelonGraph re-scored
  48. 2026-10-26 06:30 UTCGHSA enrichmentGHSA-jvcr-f7jv-xq3j · GitHub severity CRITICAL · GitHub CVSS 9.6
  49. 2026-10-25 16:32 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  50. 2026-10-25 14:56 UTCEchelonGraph re-scored
  51. 2026-10-25 07:22 UTCEchelonGraph re-scored
  52. 2026-10-25 07:22 UTCGHSA enrichmentGHSA-jvcr-f7jv-xq3j · GitHub severity CRITICAL · GitHub CVSS 9.6
  53. 2026-10-24 16:31 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  54. 2026-10-24 08:14 UTCEchelonGraph re-scored
  55. 2026-10-24 08:14 UTCGHSA enrichmentGHSA-jvcr-f7jv-xq3j · GitHub severity CRITICAL · GitHub CVSS 9.6
  56. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  57. 2026-10-23 09:05 UTCEchelonGraph re-scored
  58. 2026-10-23 09:05 UTCGHSA enrichmentGHSA-jvcr-f7jv-xq3j · GitHub severity CRITICAL · GitHub CVSS 9.6
  59. 2026-10-22 16:33 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  60. 2026-10-22 09:52 UTCEchelonGraph re-scored
  61. 2026-10-22 09:52 UTCGHSA enrichmentGHSA-jvcr-f7jv-xq3j · GitHub severity CRITICAL · GitHub CVSS 9.6
  62. 2026-10-21 16:31 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  63. 2026-10-21 10:40 UTCEchelonGraph re-scored
  64. 2026-10-21 10:40 UTCGHSA enrichmentGHSA-jvcr-f7jv-xq3j · GitHub severity CRITICAL · GitHub CVSS 9.6
  65. 2026-10-20 16:31 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  66. 2026-10-20 11:30 UTCEchelonGraph re-scored
  67. 2026-10-20 11:30 UTCGHSA enrichmentGHSA-jvcr-f7jv-xq3j · GitHub severity CRITICAL · GitHub CVSS 9.6
  68. 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  69. 2026-10-19 12:14 UTCEchelonGraph re-scored
  70. 2026-10-19 12:14 UTCGHSA enrichmentGHSA-jvcr-f7jv-xq3j · GitHub severity CRITICAL · GitHub CVSS 9.6
  71. 2026-10-18 16:31 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  72. 2026-10-18 10:24 UTCGHSA enrichmentGHSA-jvcr-f7jv-xq3j · GitHub severity CRITICAL · GitHub CVSS 9.6
  73. 2026-10-18 05:10 UTCEchelonGraph re-scored
  74. 2026-10-17 16:33 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  75. 2026-10-17 07:17 UTCEchelonGraph re-scored

Frequently asked(5)

What is CVE-2026-102309?
CVE-2026-102309 is a critical-severity vulnerability; its CVE record was published on September 29, 2026. Use after free in FullScreen in Google Chrome prior to 154.0.8037.92 allowed a remote attacker to execute arbitrary code outside the sandbox via a crafted HTML page. (Chromium security severity: High)
When was the CVE record for CVE-2026-102309 published?
The CVE record for CVE-2026-102309 was published on September 29, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of September 30, 2026; the record at its source may have been updated since.
Is CVE-2026-102309 actively exploited?
CVE-2026-102309 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (25th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-102309?
CVE-2026-102309 has a CVSS v3.1 base score of 9.6 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-102309?
A fix for CVE-2026-102309 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-102309 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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