CVE-2026-9955

MEDIUMNVD 4.34.3—
EchelonGraph scoreMEDIUM confidence

Score 4.3 from GitHub Security Advisory published 2026-05-29. 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
4.3
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 4.3Exploit: NoneExposed: 0

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

Inappropriate implementation in iOS in Google Chrome on iOS prior to 148.0.7778.216 allowed a remote attacker to leak cross-origin data via a crafted HTML page. (Chromium security severity: High)

CVSS v3
4.3
EG Score
4.3(medium)
EPSS
9.2%
KEV
Not listed

Published

May 28, 2026

Last Modified

June 1, 2026

Advisory Details (2)

Auto-updated Jun 15, 2026
No patch confirmed yet.
generic

Chromium

https://issues.chromium.org/issues/504184408
generic

Chrome Releases: Stable Channel Update for Desktop

https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0877304591.html

Vendor Advisories for CVE-2026-9955(2)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 16× in last 7d / 74× 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 137 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-9955?
CVE-2026-9955 is a medium vulnerability published on May 28, 2026. Inappropriate implementation in iOS in Google Chrome on iOS prior to 148.0.7778.216 allowed a remote attacker to leak cross-origin data via a crafted HTML page. (Chromium security severity: High)
When was CVE-2026-9955 disclosed?
CVE-2026-9955 was first published in the National Vulnerability Database on May 28, 2026, with the most recent update on June 1, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-9955 actively exploited?
CVE-2026-9955 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 9.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-9955?
CVE-2026-9955 has a CVSS v3 base score of 4.3 (NVD).
How do I remediate CVE-2026-9955?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-9955, 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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