CVE-2026-54433

CRITICALNVD 10.010.0—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 10.0 under NVD CVSS v3. EPSS exploit probability: 0.3%, top 77% of all CVEs by exploit prediction. GitHub Security Advisory enrichment pending alignment with NVD CVSS.

Triggered by: NVD CVSS baseline
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
10.0EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 10.0Exploit: None knownExposed: 0

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

In Roundcube Webmail before 1.6.17 and 1.7.x before 1.7.2, there is Stored Cross-Site Scripting (XSS) via a crafted plain-text email message. The attacker-controlled JavaScript executes within the victim's authenticated session simply by opening or previewing the message (zero-click).

CVSS v3
10.0
EG Score
10.0(medium)
EG Risk
60(Track)
EG Risk 60/100SSVC: 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
Severity100% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
23%
KEV
Not listed

Published

July 14, 2026

Last Modified

July 17, 2026

Advisory Details (1)

Auto-updated Aug 29, 2026
No patch confirmed yet.
generic

Security updates 1.6.17 and 1.7.2 released

https://roundcube.net/news/2026/07/05/security-updates-1.6.17-and-1.7.2

Vendor Advisories for CVE-2026-54433(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
roundcube1.4.11+dfsg.1-4 ... 1.4.15+dfsg.1-1~deb11u2~bpo10+1 (18 versions)1.4.15+dfsg.1-1+deb11u10—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
roundcube1.6.1+dfsg-1 ... 1.6.5+dfsg-1~deb12u1 (17 versions)1.6.5+dfsg-1+deb12u10—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
roundcube1.6.11+dfsg-1 ... 1.6.16+dfsg-1 (10 versions)1.6.17+dfsg-0+deb13u1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
roundcube1.6.11+dfsg-1 ... 1.6.16+dfsg-1 (6 versions)1.6.17+dfsg-1—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 33× in last 7d / 209× 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 273 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-54433?
CVE-2026-54433 is a critical vulnerability published on July 14, 2026. In Roundcube Webmail before 1.6.17 and 1.7.x before 1.7.2, there is Stored Cross-Site Scripting (XSS) via a crafted plain-text email message. The attacker-controlled JavaScript executes within the victim's authenticated session simply by opening or previewing the message (zero-click).
When was CVE-2026-54433 disclosed?
CVE-2026-54433 was first published in the National Vulnerability Database on July 14, 2026, with the most recent update on July 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-54433 actively exploited?
CVE-2026-54433 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 76.6% of all scored CVEs.
What is the CVSS score of CVE-2026-54433?
CVE-2026-54433 has a CVSS v3 base score of 10.0 (NVD).
How do I remediate CVE-2026-54433?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-54433, 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-2026-54433

Explore →

Is Your Infrastructure Affected by CVE-2026-54433?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs