CVE-2026-9115

MEDIUMNVD 4.34.3—
EchelonGraph scoreMEDIUM confidence

Score 4.3 from GitHub Security Advisory published 2026-05-20. NVD baseline CVSS 4.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
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%CVSS: 4.3Exploit: None knownExposed: 0

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

Insufficient policy enforcement in Service Worker in Google Chrome on prior to 148.0.7778.179 allowed a remote attacker to bypass same origin policy via a crafted HTML page. (Chromium security severity: High)

CVSS v3
4.3
Vendor severity
HIGHper Google (Chromium)Vendor's own band, not a CVSS rating — advisory text: (Chromium security severity: High)
EG Score
4.3(medium)
EG Risk
19(Track)
EG Risk 19/100SSVC: 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
Severity43% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
13%
KEV
Not listed

Published

May 20, 2026

Last Modified

July 23, 2026

Advisory Details (2)

Auto-updated Jun 17, 2026
No patch confirmed yet.
generic

Chromium

https://issues.chromium.org/issues/495999481
generic

Chrome Releases: Stable Channel Update for Desktop

https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0841193308.html

Vendor Advisories for CVE-2026-9115(2)

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

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
chromium100.0.4896.127-1 ... 99.0.4844.84-1~deb11u1 (500 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
chromium113.0.5672.126-1 ... 148.0.7778.96-3 (356 versions)148.0.7778.178-1~deb12u1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
chromium138.0.7204.183-1 ... 148.0.7778.96-3 (122 versions)148.0.7778.178-1~deb13u1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
chromium138.0.7204.183-1 ... 148.0.7778.96-3 (123 versions)148.0.7778.178-1—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 14× in last 7d / 82× 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 195 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-9115?
CVE-2026-9115 is a medium vulnerability published on May 20, 2026. Insufficient policy enforcement in Service Worker in Google Chrome on prior to 148.0.7778.179 allowed a remote attacker to bypass same origin policy via a crafted HTML page. (Chromium security severity: High)
When was CVE-2026-9115 disclosed?
CVE-2026-9115 was first published in the National Vulnerability Database on May 20, 2026, with the most recent update on July 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-9115 actively exploited?
CVE-2026-9115 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 87.1% of all scored CVEs.
What is the CVSS score of CVE-2026-9115?
CVE-2026-9115 has a CVSS v3 base score of 4.3 (NVD).
How do I remediate CVE-2026-9115?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-9115, 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

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