CVE-2026-17870

MEDIUMPre-NVD 4.34.3—
EchelonGraph scoreMEDIUM confidence

Score 4.3 from GitHub Security Advisory published 2026-07-30. 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%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 validation of untrusted input in Cast in Google Chrome prior to 151.0.7922.72 allowed an attacker on the local network segment to leak cross-origin data via malicious network traffic. (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
4.3(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
2%
KEV
Not listed

Published

July 30, 2026

Last Modified

August 3, 2026

Advisory Details (2)

Auto-updated Jul 30, 2026
No patch confirmed yet.
generic

Chromium

https://issues.chromium.org/issues/521784856
generic

Chrome Releases: Stable Channel Update for Desktop

https://chromereleases.googleblog.com/2026/07/stable-channel-update-for-desktop_0887107924.html

Vendor Advisories for CVE-2026-17870(1)

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 ... 151.0.7922.47-1 (394 versions)151.0.7922.71-1~deb12u1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
chromium138.0.7204.183-1 ... 151.0.7922.71-1~deb12u1 (160 versions)151.0.7922.71-1~deb13u1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
chromium138.0.7204.183-1 ... 151.0.7922.71-1~deb13u1 (162 versions)——

Weakness Classification(1)

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

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 21× in last 7d / 107× 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 114 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-17870?
CVE-2026-17870 is a medium vulnerability published on July 30, 2026. Insufficient validation of untrusted input in Cast in Google Chrome prior to 151.0.7922.72 allowed an attacker on the local network segment to leak cross-origin data via malicious network traffic. (Chromium security severity: Medium)
When was CVE-2026-17870 disclosed?
CVE-2026-17870 was first published in the National Vulnerability Database on July 30, 2026, with the most recent update on August 3, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-17870 actively exploited?
CVE-2026-17870 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 98.2% of all scored CVEs.
What is the CVSS score of CVE-2026-17870?
CVE-2026-17870 has a CVSS v3.1 base score of 4.3 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-17870?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-17870, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-17870

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