CVE-2026-28871

MEDIUMPre-NVD 4.34.3—
EchelonGraph scoreMEDIUM confidence

Score 4.3 from GitHub Security Advisory published 2026-03-25. 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
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

A fix is available — apply it.

A logic issue was addressed with improved checks. This issue is fixed in Safari 26.4, iOS 18.7.7 and iPadOS 18.7.7, iOS 26.4 and iPadOS 26.4, macOS Tahoe 26.4. Visiting a maliciously crafted website may lead to a cross-site scripting attack.

CVSS v3
4.3
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
20%
KEV
Not listed

Published

March 25, 2026

Last Modified

August 17, 2026

Advisory Details (4)

Auto-updated Aug 7, 2026
No patch confirmed yet.
generic

About the security content of Safari 26.4 - Apple Support

https://support.apple.com/en-us/126800
generic

About the security content of macOS Tahoe 26.4 - Apple Support

https://support.apple.com/en-us/126794
generic

About the security content of iOS 18.7.7 and iPadOS 18.7.7 - Apple Support

https://support.apple.com/en-us/126793
generic

About the security content of iOS 26.4 and iPadOS 26.4 - Apple Support

https://support.apple.com/en-us/126792

Vendor Advisories for CVE-2026-28871(11)

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

Patch Availability(12)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntuwebkitgtk-webdriver (2.52.3-0ubuntu0.26.04.2) @ resolute2026-08-17ubuntu
redhatwebkitgtk4-0:2.52.3-1.el7_92026-06-01redhat
redhatwebkit2gtk3-0:2.52.3-1.el9_02026-05-20redhat
redhatwebkit2gtk3-0:2.52.3-1.el9_82026-05-19redhat
redhatwebkit2gtk3-0:2.52.3-1.el9_22026-05-13redhat
redhatwebkit2gtk3-0:2.52.3-1.el8_42026-05-11redhat
redhatwebkit2gtk3-0:2.52.3-1.el9_42026-05-07redhat
redhatwebkit2gtk3-0:2.52.3-1.el8_62026-05-05redhat
redhatwebkit2gtk3-0:2.52.3-1.el8_82026-04-29redhat
redhatwebkit2gtk3-0:2.52.3-1.el9_62026-04-28redhat
redhatwebkit2gtk3-0:2.52.3-1.el8_102026-04-27redhat
redhatwebkit2gtk3-0:2.52.3-0.el9_7.12026-04-22redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(8 across 4 ecosystems)
Debian:11(2)
PackageVulnerable rangeFixed inDependents
webkit2gtk2.32.3-1 ... 2.53.4-1 (246 versions)——
wpewebkit2.32.3-2 ... 2.52.5-1 (90 versions)——
Debian:12(2)
PackageVulnerable rangeFixed inDependents
webkit2gtk2.40.1-1 ... 2.53.91-1 (165 versions)——
wpewebkit2.38.6-1 ... 2.52.6-1 (54 versions)——
Debian:13(2)
PackageVulnerable rangeFixed inDependents
webkit2gtk2.48.3-1 ... 2.52.3-1 (45 versions)2.52.3-2~deb13u1—
wpewebkit2.48.3-1 ... 2.52.6-1 (20 versions)——
Debian:14(2)
PackageVulnerable rangeFixed inDependents
webkit2gtk2.48.3-1 ... 2.52.0-1 (41 versions)2.52.1-1—
wpewebkit2.48.3-1 ... 2.52.0-1 (13 versions)2.52.1-1—

Weakness Classification(1)

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

Additional Vendor Advisories

(1)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 6× in last 7d / 26× 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.

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

Frequently asked(5)

What is CVE-2026-28871?
CVE-2026-28871 is a medium vulnerability published on March 25, 2026. A logic issue was addressed with improved checks. This issue is fixed in Safari 26.4, iOS 18.7.7 and iPadOS 18.7.7, iOS 26.4 and iPadOS 26.4, macOS Tahoe 26.4. Visiting a maliciously crafted website may lead to a cross-site scripting attack.
When was CVE-2026-28871 disclosed?
CVE-2026-28871 was first published in the National Vulnerability Database on March 25, 2026, with the most recent update on August 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-28871 actively exploited?
CVE-2026-28871 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 79.7% of all scored CVEs.
What is the CVSS score of CVE-2026-28871?
CVE-2026-28871 has a CVSS v3.1 base score of 4.3 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-28871?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-28871, 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-2026-28871

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