CVE-2026-79238

MEDIUMPre-NVD 4.34.3
EchelonGraph scoreMEDIUM confidence

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

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 (Vulnrichment) CVSS v3.1, EPSS, GitHub Security Advisory
Trending — 4 sources updated this week
4.3EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • 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.

Incorrect authorization in ServiceWorker 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: 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 19/100

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 (value × EchelonGraph’s weight)
Severity43% × 45%
The EG Score, 4.3 of 10.
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 every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (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
16th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track 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). 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)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (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

August 25, 2026

Last Modified

September 17, 2026

Advisory Details (2)

Auto-updated Aug 27, 2026
Patch available.
Web page

Chromium

https://issues.chromium.org/issues/517774971
Web page

Chrome Releases: Stable Channel Update for Desktop

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

Vendor Advisories for CVE-2026-79238(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 20× in last 7d / 106× 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 it from the CNA feed. 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). Most recent first.

Showing the most recent 100 of 179 refreshes 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 79 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  2. 2026-10-12 16:35 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  3. 2026-10-12 14:58 UTCEG score recompute
  4. 2026-10-11 19:22 UTCEG score recompute
  5. 2026-10-11 16:38 UTCEG score recompute
  6. 2026-10-11 13:56 UTCEG score recompute
  7. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  8. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  9. 2026-10-10 11:23 UTCEG score recompute
  10. 2026-10-10 11:23 UTCVendor advisory
  11. 2026-10-10 11:23 UTCGHSA enrichmentGHSA-fv55-2p8j-mhm4 · GitHub CVSS 4.3
  12. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  13. 2026-10-09 03:52 UTCEG score recompute
  14. 2026-10-09 03:52 UTCVendor advisory
  15. 2026-10-09 03:51 UTCGHSA enrichmentGHSA-fv55-2p8j-mhm4 · GitHub CVSS 4.3
  16. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  17. 2026-10-08 02:25 UTCEG score recompute
  18. 2026-10-08 02:25 UTCVendor advisory
  19. 2026-10-08 02:25 UTCGHSA enrichmentGHSA-fv55-2p8j-mhm4 · GitHub CVSS 4.3
  20. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  21. 2026-10-07 00:13 UTCEG score recompute
  22. 2026-10-07 00:13 UTCVendor advisory
  23. 2026-10-07 00:13 UTCGHSA enrichmentGHSA-fv55-2p8j-mhm4 · GitHub CVSS 4.3
  24. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  25. 2026-10-06 01:57 UTCEG score recompute
Show 75 more
  1. 2026-10-06 01:57 UTCVendor advisory
  2. 2026-10-06 01:57 UTCGHSA enrichmentGHSA-fv55-2p8j-mhm4 · GitHub CVSS 4.3
  3. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  4. 2026-10-05 01:31 UTCEG score recompute
  5. 2026-10-05 01:31 UTCVendor advisory
  6. 2026-10-05 01:31 UTCGHSA enrichmentGHSA-fv55-2p8j-mhm4 · GitHub CVSS 4.3
  7. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  8. 2026-10-04 03:15 UTCEG score recompute
  9. 2026-10-04 03:15 UTCVendor advisory
  10. 2026-10-04 03:15 UTCGHSA enrichmentGHSA-fv55-2p8j-mhm4 · GitHub CVSS 4.3
  11. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  12. 2026-10-03 04:58 UTCEG score recompute
  13. 2026-10-03 04:58 UTCVendor advisory
  14. 2026-10-03 04:58 UTCGHSA enrichmentGHSA-fv55-2p8j-mhm4 · GitHub CVSS 4.3
  15. 2026-10-02 06:26 UTCEG score recompute
  16. 2026-10-02 06:26 UTCVendor advisory
  17. 2026-10-02 06:26 UTCGHSA enrichmentGHSA-fv55-2p8j-mhm4 · GitHub CVSS 4.3
  18. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  19. 2026-10-01 05:35 UTCEG score recompute
  20. 2026-10-01 05:35 UTCVendor advisory
  21. 2026-10-01 05:35 UTCGHSA enrichmentGHSA-fv55-2p8j-mhm4 · GitHub CVSS 4.3
  22. 2026-09-30 06:30 UTCEG score recompute
  23. 2026-09-30 06:30 UTCVendor advisory
  24. 2026-09-30 06:30 UTCGHSA enrichmentGHSA-fv55-2p8j-mhm4 · GitHub CVSS 4.3
  25. 2026-09-29 15:24 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  26. 2026-09-28 21:25 UTCVendor advisory
  27. 2026-09-28 21:25 UTCGHSA enrichmentGHSA-fv55-2p8j-mhm4 · GitHub CVSS 4.3
  28. 2026-09-27 20:06 UTCEG score recompute
  29. 2026-09-27 20:06 UTCVendor advisory
  30. 2026-09-27 20:06 UTCGHSA enrichmentGHSA-fv55-2p8j-mhm4 · GitHub CVSS 4.3
  31. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  32. 2026-09-26 21:46 UTCEG score recompute
  33. 2026-09-26 21:46 UTCVendor advisory
  34. 2026-09-26 21:46 UTCGHSA enrichmentGHSA-fv55-2p8j-mhm4 · GitHub CVSS 4.3
  35. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  36. 2026-09-26 00:28 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  37. 2026-09-25 11:46 UTCEG score recompute
  38. 2026-09-25 11:46 UTCVendor advisory
  39. 2026-09-25 11:46 UTCGHSA enrichmentGHSA-fv55-2p8j-mhm4 · GitHub CVSS 4.3
  40. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  41. 2026-09-24 12:13 UTCEG score recompute
  42. 2026-09-24 12:13 UTCVendor advisory
  43. 2026-09-24 12:13 UTCGHSA enrichmentGHSA-fv55-2p8j-mhm4 · GitHub CVSS 4.3
  44. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  45. 2026-09-23 13:56 UTCVendor advisory
  46. 2026-09-23 13:56 UTCGHSA enrichmentGHSA-fv55-2p8j-mhm4 · GitHub CVSS 4.3
  47. 2026-09-22 15:38 UTCEG score recompute
  48. 2026-09-22 15:38 UTCVendor advisory
  49. 2026-09-22 15:38 UTCGHSA enrichmentGHSA-fv55-2p8j-mhm4 · GitHub CVSS 4.3
  50. 2026-09-21 21:09 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  51. 2026-09-21 17:22 UTCEG score recompute
  52. 2026-09-21 17:22 UTCVendor advisory
  53. 2026-09-21 17:22 UTCGHSA enrichmentGHSA-fv55-2p8j-mhm4 · GitHub CVSS 4.3
  54. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  55. 2026-09-20 18:12 UTCVendor advisory
  56. 2026-09-20 18:12 UTCGHSA enrichmentGHSA-fv55-2p8j-mhm4 · GitHub CVSS 4.3
  57. 2026-09-19 19:48 UTCEG score recompute
  58. 2026-09-19 19:48 UTCVendor advisory
  59. 2026-09-19 19:48 UTCGHSA enrichmentGHSA-fv55-2p8j-mhm4 · GitHub CVSS 4.3
  60. 2026-09-18 21:32 UTCEG score recompute
  61. 2026-09-18 21:32 UTCVendor advisory
  62. 2026-09-18 21:32 UTCGHSA enrichmentGHSA-fv55-2p8j-mhm4 · GitHub CVSS 4.3
  63. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  64. 2026-09-17 22:51 UTCEG score recompute
  65. 2026-09-17 22:51 UTCVendor advisory
  66. 2026-09-17 22:50 UTCGHSA enrichmentGHSA-fv55-2p8j-mhm4 · GitHub CVSS 4.3
  67. 2026-09-17 10:25 UTCEG score recompute
  68. 2026-09-17 10:25 UTCVendor advisory
  69. 2026-09-17 10:25 UTCGHSA enrichmentGHSA-fv55-2p8j-mhm4 · GitHub CVSS 4.3
  70. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  71. 2026-09-16 12:09 UTCEG score recompute
  72. 2026-09-16 12:09 UTCVendor advisory
  73. 2026-09-16 12:09 UTCGHSA enrichmentGHSA-fv55-2p8j-mhm4 · GitHub CVSS 4.3
  74. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  75. 2026-09-15 13:53 UTCEG score recompute

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-79238?
CVE-2026-79238 is a medium-severity vulnerability; its CVE record was published on August 25, 2026. Incorrect authorization in ServiceWorker 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: Medium)
When was the CVE record for CVE-2026-79238 published?
The CVE record for CVE-2026-79238 was published on August 25, 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 17, 2026; the record at its source may have been updated since.
Is CVE-2026-79238 actively exploited?
CVE-2026-79238 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (16th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-79238?
CVE-2026-79238 has a CVSS v3.1 base score of 4.3 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-79238?
A fix for CVE-2026-79238 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-79238 are linked in the Vendor Advisories panel on this page.

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