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
6.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 6.3Exploit: None knownExposed services: Not assessed

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

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
6.3MEDIUMmedium confidence
EG Risk
28
EG Risk 28/100

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%
EPSS PROB
0.2%
EPSS %ILE
11th
KEV
Not listed

Published

July 6, 2026

Last Modified

July 8, 2026

Advisory Details (2)

Auto-updated Jul 7, 2026
No fix on record 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 7× in last 7d / 33× 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 172 total refreshes for this CVE.

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

Related CVEs(same CWE)

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 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 0.2% probability of exploitation in the next 30 days (11th percentile of EPSS-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?
No fix for CVE-2026-13356 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-13356 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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