CVE-2026-13356

MEDIUMPre-NVD 6.36.3—
EchelonGraph scoreMEDIUM confidence

Score 6.3 from GitHub Security Advisory published 2026-07-07. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 6.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
6.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.3Exploit: None knownExposed: 0

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

A malicious webpage could interrupt a pending navigation by enqueuing a synchronous JavaScript dialog, causing the browser UI to display the destination origin in the address bar while continuing to render attacker-controlled content. This vulnerability was fixed in Firefox for iOS 152.3.

CVSS v3
6.3
EG Score
6.3(medium)
EG Risk
28(Track)
EG Risk 28/100SSVC: 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
Severity63% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
12%
KEV
Not listed

Published

July 6, 2026

Last Modified

July 8, 2026

Advisory Details (2)

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

Security Vulnerabilities fixed in Firefox for iOS 152.3 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2026-65/
generic

Access Denied

https://bugzilla.mozilla.org/show_bug.cgi?id=2047768

Vendor Advisories for CVE-2026-13356(1)

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 / 83× 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 119 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-13356?
CVE-2026-13356 is a medium vulnerability published on July 6, 2026. A malicious webpage could interrupt a pending navigation by enqueuing a synchronous JavaScript dialog, causing the browser UI to display the destination origin in the address bar while continuing to render attacker-controlled content. This vulnerability was fixed in Firefox for iOS 152.3.
When was CVE-2026-13356 disclosed?
CVE-2026-13356 was first published in the National Vulnerability Database on July 6, 2026, with the most recent update on July 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-13356 actively exploited?
CVE-2026-13356 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 87.8% of all scored CVEs.
What is the CVSS score of CVE-2026-13356?
CVE-2026-13356 has a CVSS v3.1 base score of 6.3 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-13356?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-13356, 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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