CVE-2026-62643

CRITICALNVD 10.010.0
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to NVD's CVSS score.

This critical-severity CVE scores 10.0 under NVD CVSS v3. EPSS exploit probability: 0.2% (14th percentile of EPSS-scored CVEs). GitHub Security Advisory CVSS 7.2 is lower than this score; a lower GitHub score revises it only when its advisory is newer than the CVE record's last change, and this advisory (published 2026-07-14) is not newer than that change (2026-07-20), so it does not.

Triggered by: Headline CVSS from NVD CVSS v3
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
Trending — 3 sources updated this week
10.0EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 10.0Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

In Roundcube Webmail before 1.6.17 and 1.7.x before 1.7.2, insufficient Cascading Style Sheets (CSS) sanitization in HTML e-mail messages may lead to SSRF or Information Disclosure, e.g., if stylesheet links point to local network hosts. NOTE: this issue exists because of insufficient fixes for CVE-2026-35540 and CVE-2026-48843.

CVSS v3
10.0
EG Score
10.0CRITICALmedium confidence
EG Risk
60
EG Risk 60/100

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 (value × EchelonGraph’s weight)
Severity100% × 45%
The EG Score, 10.0 of 10.
Exploitation0.2% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.2%
EPSS %ILE
14th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; 60 days if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

July 14, 2026

Last Modified

July 20, 2026

Advisory Details (5)

Auto-updated Oct 13, 2026
Patch available. Sources: github_commit, github_release.
Web page

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
GitHub release Patch Available

Roundcube Webmail 1.7.2

Patch available: roundcube/roundcubemail 1.7.2

https://github.com/roundcube/roundcubemail/releases/tag/1.7.2
GitHub release Patch Available

Roundcube Webmail 1.6.17

Patch available: roundcube/roundcubemail 1.6.17

https://github.com/roundcube/roundcubemail/releases/tag/1.6.17
GitHub commit

commit 6d69e094d55d (roundcube/roundcubemail)

Fix landed in roundcube/roundcubemail commit 6d69e094d55d — awaiting tagged release

https://github.com/roundcube/roundcubemail/commit/6d69e094d55d3a9a84dfb36edf6ca985311f0c1c
GitHub commit

commit 294c7da6e728 (roundcube/roundcubemail)

Fix landed in roundcube/roundcubemail commit 294c7da6e728 — awaiting tagged release

https://github.com/roundcube/roundcubemail/commit/294c7da6e7284166f040cef8607b677d459e0786

Vendor Advisories for CVE-2026-62643(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 rangeFix by version rangeDependents
roundcube1.4.11+dfsg.1-4 ... 1.4.15+dfsg.1-1~deb11u2~bpo10+1 (18 versions)
  • every version up to 1.4.15+dfsg.1-1+deb11u10: fixed in 1.4.15+dfsg.1-1+deb11u10
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
roundcube1.6.1+dfsg-1 ... 1.6.5+dfsg-1~deb12u1 (17 versions)
  • every version up to 1.6.5+dfsg-1+deb12u10: fixed in 1.6.5+dfsg-1+deb12u10
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
roundcube1.6.11+dfsg-1 ... 1.6.16+dfsg-1 (10 versions)
  • every version up to 1.6.17+dfsg-0+deb13u1: fixed in 1.6.17+dfsg-0+deb13u1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
roundcube1.6.11+dfsg-1 ... 1.6.16+dfsg-1 (6 versions)
  • every version up to 1.6.17+dfsg-1: fixed in 1.6.17+dfsg-1
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 16× in last 7d / 44× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 100 of 366 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 266 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-14 08:47 UTCEG score recompute
  2. 2026-10-14 08:47 UTCGHSA enrichmentGHSA-5q79-cfqm-5cxh · GitHub severity HIGH · GitHub CVSS 7.2
  3. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  4. 2026-10-13 04:26 UTCEG score recompute
  5. 2026-10-13 04:26 UTCGHSA enrichmentGHSA-5q79-cfqm-5cxh · GitHub severity HIGH · GitHub CVSS 7.2
  6. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  7. 2026-10-12 15:49 UTCEG score recompute
  8. 2026-10-12 06:17 UTCGHSA enrichmentGHSA-5q79-cfqm-5cxh · GitHub severity HIGH · GitHub CVSS 7.2
  9. 2026-10-11 19:34 UTCEG score recompute
  10. 2026-10-11 16:49 UTCEG score recompute
  11. 2026-10-11 14:10 UTCEG score recompute
  12. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  13. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  14. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  15. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  16. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  17. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  18. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  19. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  20. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  21. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  22. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  23. 2026-10-01 13:23 UTCEG score recompute
  24. 2026-10-01 13:23 UTCGHSA enrichmentGHSA-5q79-cfqm-5cxh · GitHub severity HIGH · GitHub CVSS 7.2
  25. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.4% · 35th percentile
Show 75 more
  1. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  2. 2026-09-28 13:17 UTCGHSA enrichmentGHSA-5q79-cfqm-5cxh · GitHub severity HIGH · GitHub CVSS 7.2
  3. 2026-09-28 09:20 UTCEG score recompute
  4. 2026-09-28 09:20 UTCGHSA enrichmentGHSA-5q79-cfqm-5cxh · GitHub severity HIGH · GitHub CVSS 7.2
  5. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  6. 2026-09-24 09:51 UTCEG score recompute
  7. 2026-09-24 09:51 UTCGHSA enrichmentGHSA-5q79-cfqm-5cxh · GitHub severity HIGH · GitHub CVSS 7.2
  8. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  9. 2026-09-23 11:42 UTCGHSA enrichmentGHSA-5q79-cfqm-5cxh · GitHub severity HIGH · GitHub CVSS 7.2
  10. 2026-09-23 07:46 UTCGHSA enrichmentGHSA-5q79-cfqm-5cxh · GitHub severity HIGH · GitHub CVSS 7.2
  11. 2026-09-23 03:55 UTCEG score recompute
  12. 2026-09-23 03:55 UTCGHSA enrichmentGHSA-5q79-cfqm-5cxh · GitHub severity HIGH · GitHub CVSS 7.2
  13. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  14. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  15. 2026-09-18 10:04 UTCGHSA enrichmentGHSA-5q79-cfqm-5cxh · GitHub severity HIGH · GitHub CVSS 7.2
  16. 2026-09-18 04:54 UTCEG score recompute
  17. 2026-09-18 04:54 UTCGHSA enrichmentGHSA-5q79-cfqm-5cxh · GitHub severity HIGH · GitHub CVSS 7.2
  18. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  19. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  20. 2026-09-14 11:02 UTCGHSA enrichmentGHSA-5q79-cfqm-5cxh · GitHub severity HIGH · GitHub CVSS 7.2
  21. 2026-09-14 07:09 UTCGHSA enrichmentGHSA-5q79-cfqm-5cxh · GitHub severity HIGH · GitHub CVSS 7.2
  22. 2026-09-14 03:18 UTCGHSA enrichmentGHSA-5q79-cfqm-5cxh · GitHub severity HIGH · GitHub CVSS 7.2
  23. 2026-09-13 23:27 UTCEG score recompute
  24. 2026-09-13 23:27 UTCGHSA enrichmentGHSA-5q79-cfqm-5cxh · GitHub severity HIGH · GitHub CVSS 7.2
  25. 2026-09-13 16:28 UTCGHSA enrichmentGHSA-5q79-cfqm-5cxh · GitHub severity HIGH · GitHub CVSS 7.2
  26. 2026-09-13 11:51 UTCGHSA enrichmentGHSA-5q79-cfqm-5cxh · GitHub severity HIGH · GitHub CVSS 7.2
  27. 2026-09-13 07:53 UTCGHSA enrichmentGHSA-5q79-cfqm-5cxh · GitHub severity HIGH · GitHub CVSS 7.2
  28. 2026-09-12 17:10 UTCEG score recompute
  29. 2026-09-12 17:10 UTCGHSA enrichmentGHSA-5q79-cfqm-5cxh · GitHub severity HIGH · GitHub CVSS 7.2
  30. 2026-09-12 13:18 UTCGHSA enrichmentGHSA-5q79-cfqm-5cxh · GitHub severity HIGH · GitHub CVSS 7.2
  31. 2026-09-12 07:28 UTCGHSA enrichmentGHSA-5q79-cfqm-5cxh · GitHub severity HIGH · GitHub CVSS 7.2
  32. 2026-09-12 01:45 UTCEG score recompute
  33. 2026-09-12 01:45 UTCGHSA enrichmentGHSA-5q79-cfqm-5cxh · GitHub severity HIGH · GitHub CVSS 7.2
  34. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  35. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  36. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  37. 2026-09-08 01:44 UTCEG score recompute
  38. 2026-09-08 01:44 UTCGHSA enrichmentGHSA-5q79-cfqm-5cxh · GitHub severity HIGH · GitHub CVSS 7.2
  39. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  40. 2026-09-06 17:50 UTCEG score recompute
  41. 2026-09-06 17:50 UTCGHSA enrichmentGHSA-5q79-cfqm-5cxh · GitHub severity HIGH · GitHub CVSS 7.2
  42. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  43. 2026-09-06 13:46 UTCGHSA enrichmentGHSA-5q79-cfqm-5cxh · GitHub severity HIGH · GitHub CVSS 7.2
  44. 2026-09-06 05:26 UTCGHSA enrichmentGHSA-5q79-cfqm-5cxh · GitHub severity HIGH · GitHub CVSS 7.2
  45. 2026-09-06 01:34 UTCGHSA enrichmentGHSA-5q79-cfqm-5cxh · GitHub severity HIGH · GitHub CVSS 7.2
  46. 2026-09-05 21:17 UTCEG score recompute
  47. 2026-09-05 21:17 UTCGHSA enrichmentGHSA-5q79-cfqm-5cxh · GitHub severity HIGH · GitHub CVSS 7.2
  48. 2026-09-05 15:31 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  49. 2026-09-04 05:07 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  50. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  51. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  52. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  53. 2026-08-31 05:40 UTCGHSA enrichmentGHSA-5q79-cfqm-5cxh · GitHub severity HIGH · GitHub CVSS 7.2
  54. 2026-08-31 00:03 UTCGHSA enrichmentGHSA-5q79-cfqm-5cxh · GitHub severity HIGH · GitHub CVSS 7.2
  55. 2026-08-30 20:11 UTCEG score recompute
  56. 2026-08-30 20:11 UTCGHSA enrichmentGHSA-5q79-cfqm-5cxh · GitHub severity HIGH · GitHub CVSS 7.2
  57. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  58. 2026-08-30 16:20 UTCGHSA enrichmentGHSA-5q79-cfqm-5cxh · GitHub severity HIGH · GitHub CVSS 7.2
  59. 2026-08-30 10:58 UTCGHSA enrichmentGHSA-5q79-cfqm-5cxh · GitHub severity HIGH · GitHub CVSS 7.2
  60. 2026-08-30 05:24 UTCEG score recompute
  61. 2026-08-30 05:24 UTCGHSA enrichmentGHSA-5q79-cfqm-5cxh · GitHub severity HIGH · GitHub CVSS 7.2
  62. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  63. 2026-08-28 21:42 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  64. 2026-08-28 02:02 UTCGHSA enrichmentGHSA-5q79-cfqm-5cxh · GitHub severity HIGH · GitHub CVSS 7.2
  65. 2026-08-27 21:33 UTCEG score recompute
  66. 2026-08-27 21:33 UTCGHSA enrichmentGHSA-5q79-cfqm-5cxh · GitHub severity HIGH · GitHub CVSS 7.2
  67. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  68. 2026-08-27 13:51 UTCGHSA enrichmentGHSA-5q79-cfqm-5cxh · GitHub severity HIGH · GitHub CVSS 7.2
  69. 2026-08-27 03:44 UTCGHSA enrichmentGHSA-5q79-cfqm-5cxh · GitHub severity HIGH · GitHub CVSS 7.2
  70. 2026-08-26 23:36 UTCEG score recompute
  71. 2026-08-26 23:36 UTCGHSA enrichmentGHSA-5q79-cfqm-5cxh · GitHub severity HIGH · GitHub CVSS 7.2
  72. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  73. 2026-08-26 12:15 UTCGHSA enrichmentGHSA-5q79-cfqm-5cxh · GitHub severity HIGH · GitHub CVSS 7.2
  74. 2026-08-26 05:59 UTCGHSA enrichmentGHSA-5q79-cfqm-5cxh · GitHub severity HIGH · GitHub CVSS 7.2
  75. 2026-08-26 01:44 UTCGHSA enrichmentGHSA-5q79-cfqm-5cxh · GitHub severity HIGH · GitHub CVSS 7.2

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-62643?
CVE-2026-62643 is a critical-severity vulnerability; its CVE record was published on July 14, 2026. In Roundcube Webmail before 1.6.17 and 1.7.x before 1.7.2, insufficient Cascading Style Sheets (CSS) sanitization in HTML e-mail messages may lead to SSRF or Information Disclosure, e.g., if stylesheet links point to local network hosts. NOTE: this issue exists because of insufficient fixes for…
When was the CVE record for CVE-2026-62643 published?
The CVE record for CVE-2026-62643 was published on July 14, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of July 20, 2026; the record at its source may have been updated since.
Is CVE-2026-62643 actively exploited?
CVE-2026-62643 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (14th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-62643?
CVE-2026-62643 has a CVSS v3 base score of 10.0 (NVD).
How do I remediate CVE-2026-62643?
A fix for CVE-2026-62643 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-62643 are linked in the Vendor Advisories panel on this page.

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