CVE-2026-62644

CRITICALNVD 9.89.8
EchelonGraph scoreMEDIUM confidence

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

This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 0.5% (41st percentile of EPSS-scored CVEs). GitHub Security Advisory CVSS 6.4 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
9.8EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 9.8Exploit: 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, the password plugin of the Roundcube Webmail was subject to username spoofing via session data, which could lead to account takeover.

CVSS v3
9.8
EG Score
9.8CRITICALmedium confidence
EG Risk
44
EG Risk 44/100

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)
Severity98% × 45%
The EG Score, 9.8 of 10.
Exploitation0.5% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (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.
EPSS PROB
0.5%
EPSS %ILE
41st
KEV
Not listed

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

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (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; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact total (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 (7)

Auto-updated Oct 10, 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 9a96c20d8c7c (roundcube/roundcubemail)

Fix landed in roundcube/roundcubemail commit 9a96c20d8c7c — awaiting tagged release

https://github.com/roundcube/roundcubemail/commit/9a96c20d8c7c9135876b68bebd6960af3ee60923
GitHub commit

commit 83150ce04d68 (roundcube/roundcubemail)

Fix landed in roundcube/roundcubemail commit 83150ce04d68 — awaiting tagged release

https://github.com/roundcube/roundcubemail/commit/83150ce04d689a70f92d511bcae40adba8d55476
GitHub commit

commit 7414fef51cd2 (roundcube/roundcubemail)

Fix landed in roundcube/roundcubemail commit 7414fef51cd2 — awaiting tagged release

https://github.com/roundcube/roundcubemail/commit/7414fef51cd2407d39faab99680763f10ed5231d
GitHub commit

commit 5cdc6a48b40b (roundcube/roundcubemail)

Fix landed in roundcube/roundcubemail commit 5cdc6a48b40b — awaiting tagged release

https://github.com/roundcube/roundcubemail/commit/5cdc6a48b40beabff7f0bf5d9035f4491e877e4c

Vendor Advisories for CVE-2026-62644(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 / 43× 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 340 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 240 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-14 09:09 UTCEG score recompute
  2. 2026-10-14 09:09 UTCGHSA enrichmentGHSA-q4q9-gcgm-p77w · GitHub CVSS 6.4
  3. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  4. 2026-10-13 06:09 UTCEG score recompute
  5. 2026-10-13 06:09 UTCGHSA enrichmentGHSA-q4q9-gcgm-p77w · GitHub CVSS 6.4
  6. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  7. 2026-10-12 15:49 UTCEG score recompute
  8. 2026-10-12 06:17 UTCGHSA enrichmentGHSA-q4q9-gcgm-p77w · GitHub CVSS 6.4
  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 0.5% · 41st percentile
  13. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  14. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  15. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  16. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  17. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  18. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  19. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  20. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  21. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  22. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  23. 2026-10-01 13:23 UTCEG score recompute
  24. 2026-10-01 13:23 UTCGHSA enrichmentGHSA-q4q9-gcgm-p77w · GitHub CVSS 6.4
  25. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.5% · 40th percentile
Show 75 more
  1. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  2. 2026-09-28 13:40 UTCGHSA enrichmentGHSA-q4q9-gcgm-p77w · GitHub CVSS 6.4
  3. 2026-09-28 09:20 UTCEG score recompute
  4. 2026-09-28 09:20 UTCGHSA enrichmentGHSA-q4q9-gcgm-p77w · GitHub CVSS 6.4
  5. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  6. 2026-09-24 09:51 UTCEG score recompute
  7. 2026-09-24 09:51 UTCGHSA enrichmentGHSA-q4q9-gcgm-p77w · GitHub CVSS 6.4
  8. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  9. 2026-09-23 08:17 UTCGHSA enrichmentGHSA-q4q9-gcgm-p77w · GitHub CVSS 6.4
  10. 2026-09-23 03:55 UTCEG score recompute
  11. 2026-09-23 03:55 UTCGHSA enrichmentGHSA-q4q9-gcgm-p77w · GitHub CVSS 6.4
  12. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  13. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  14. 2026-09-18 10:04 UTCGHSA enrichmentGHSA-q4q9-gcgm-p77w · GitHub CVSS 6.4
  15. 2026-09-18 04:54 UTCEG score recompute
  16. 2026-09-18 04:54 UTCGHSA enrichmentGHSA-q4q9-gcgm-p77w · GitHub CVSS 6.4
  17. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  18. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  19. 2026-09-14 08:13 UTCGHSA enrichmentGHSA-q4q9-gcgm-p77w · GitHub CVSS 6.4
  20. 2026-09-14 03:47 UTCGHSA enrichmentGHSA-q4q9-gcgm-p77w · GitHub CVSS 6.4
  21. 2026-09-13 23:27 UTCEG score recompute
  22. 2026-09-13 23:27 UTCGHSA enrichmentGHSA-q4q9-gcgm-p77w · GitHub CVSS 6.4
  23. 2026-09-13 16:35 UTCGHSA enrichmentGHSA-q4q9-gcgm-p77w · GitHub CVSS 6.4
  24. 2026-09-13 12:13 UTCGHSA enrichmentGHSA-q4q9-gcgm-p77w · GitHub CVSS 6.4
  25. 2026-09-13 07:53 UTCEG score recompute
  26. 2026-09-13 07:53 UTCGHSA enrichmentGHSA-q4q9-gcgm-p77w · GitHub CVSS 6.4
  27. 2026-09-12 13:18 UTCGHSA enrichmentGHSA-q4q9-gcgm-p77w · GitHub CVSS 6.4
  28. 2026-09-12 07:28 UTCGHSA enrichmentGHSA-q4q9-gcgm-p77w · GitHub CVSS 6.4
  29. 2026-09-12 01:45 UTCEG score recompute
  30. 2026-09-12 01:45 UTCGHSA enrichmentGHSA-q4q9-gcgm-p77w · GitHub CVSS 6.4
  31. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  32. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  33. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  34. 2026-09-08 01:45 UTCEG score recompute
  35. 2026-09-08 01:44 UTCGHSA enrichmentGHSA-q4q9-gcgm-p77w · GitHub CVSS 6.4
  36. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  37. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  38. 2026-09-06 13:46 UTCGHSA enrichmentGHSA-q4q9-gcgm-p77w · GitHub CVSS 6.4
  39. 2026-09-06 01:38 UTCGHSA enrichmentGHSA-q4q9-gcgm-p77w · GitHub CVSS 6.4
  40. 2026-09-05 21:17 UTCEG score recompute
  41. 2026-09-05 21:17 UTCGHSA enrichmentGHSA-q4q9-gcgm-p77w · GitHub CVSS 6.4
  42. 2026-09-05 15:31 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  43. 2026-09-04 05:07 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  44. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  45. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  46. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  47. 2026-08-31 05:39 UTCGHSA enrichmentGHSA-q4q9-gcgm-p77w · GitHub CVSS 6.4
  48. 2026-08-31 00:59 UTCGHSA enrichmentGHSA-q4q9-gcgm-p77w · GitHub CVSS 6.4
  49. 2026-08-30 20:39 UTCEG score recompute
  50. 2026-08-30 20:39 UTCGHSA enrichmentGHSA-q4q9-gcgm-p77w · GitHub CVSS 6.4
  51. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  52. 2026-08-30 16:19 UTCGHSA enrichmentGHSA-q4q9-gcgm-p77w · GitHub CVSS 6.4
  53. 2026-08-30 10:58 UTCGHSA enrichmentGHSA-q4q9-gcgm-p77w · GitHub CVSS 6.4
  54. 2026-08-30 05:24 UTCEG score recompute
  55. 2026-08-30 05:24 UTCGHSA enrichmentGHSA-q4q9-gcgm-p77w · GitHub CVSS 6.4
  56. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  57. 2026-08-28 21:42 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  58. 2026-08-28 02:02 UTCGHSA enrichmentGHSA-q4q9-gcgm-p77w · GitHub CVSS 6.4
  59. 2026-08-27 21:33 UTCEG score recompute
  60. 2026-08-27 21:33 UTCGHSA enrichmentGHSA-q4q9-gcgm-p77w · GitHub CVSS 6.4
  61. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  62. 2026-08-27 13:50 UTCGHSA enrichmentGHSA-q4q9-gcgm-p77w · GitHub CVSS 6.4
  63. 2026-08-27 03:56 UTCGHSA enrichmentGHSA-q4q9-gcgm-p77w · GitHub CVSS 6.4
  64. 2026-08-26 23:36 UTCEG score recompute
  65. 2026-08-26 23:36 UTCGHSA enrichmentGHSA-q4q9-gcgm-p77w · GitHub CVSS 6.4
  66. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  67. 2026-08-26 12:14 UTCGHSA enrichmentGHSA-q4q9-gcgm-p77w · GitHub CVSS 6.4
  68. 2026-08-26 07:32 UTCGHSA enrichmentGHSA-q4q9-gcgm-p77w · GitHub CVSS 6.4
  69. 2026-08-26 01:44 UTCGHSA enrichmentGHSA-q4q9-gcgm-p77w · GitHub CVSS 6.4
  70. 2026-08-25 19:12 UTCEG score recompute
  71. 2026-08-25 19:12 UTCGHSA enrichmentGHSA-q4q9-gcgm-p77w · GitHub CVSS 6.4
  72. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  73. 2026-08-25 13:34 UTCGHSA enrichmentGHSA-q4q9-gcgm-p77w · GitHub CVSS 6.4
  74. 2026-08-25 09:13 UTCGHSA enrichmentGHSA-q4q9-gcgm-p77w · GitHub CVSS 6.4
  75. 2026-08-25 04:29 UTCGHSA enrichmentGHSA-q4q9-gcgm-p77w · GitHub CVSS 6.4

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-62644?
CVE-2026-62644 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, the password plugin of the Roundcube Webmail was subject to username spoofing via session data, which could lead to account takeover.
When was the CVE record for CVE-2026-62644 published?
The CVE record for CVE-2026-62644 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-2026-62644 actively exploited?
CVE-2026-62644 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (41st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-62644?
CVE-2026-62644 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-62644?
A fix for CVE-2026-62644 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-62644 are linked in the Vendor Advisories panel on this page.

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