CVE-2026-62644

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 0.3%, top 83% 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
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.8Exploit: 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, 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
9.8(medium)
EG Risk
44(Track)
EG Risk 44/100SSVC: 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
Severity98% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
17%
KEV
Not listed

Published

July 14, 2026

Last Modified

July 20, 2026

Advisory Details (7)

Auto-updated Jul 25, 2026
Patch available. Sources: github_commit, github_release.
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
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.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 28× in last 7d / 39× 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.

  1. 2026-07-28 09:09 UTCGHSA enrichment
  2. 2026-07-28 04:48 UTCGHSA enrichment
  3. 2026-07-28 00:25 UTCGHSA enrichment
  4. 2026-07-27 19:44 UTCGHSA enrichment
  5. 2026-07-27 15:20 UTCEG score recompute
  6. 2026-07-27 15:20 UTCGHSA enrichment
  7. 2026-07-27 14:14 UTCEPSS rescore
  8. 2026-07-27 09:30 UTCGHSA enrichment
  9. 2026-07-27 05:10 UTCGHSA enrichment
  10. 2026-07-27 00:49 UTCGHSA enrichment
  11. 2026-07-26 20:29 UTCGHSA enrichment
  12. 2026-07-26 16:08 UTCEG score recompute
  13. 2026-07-26 16:08 UTCGHSA enrichment
  14. 2026-07-26 14:54 UTCEPSS rescore
  15. 2026-07-26 14:54 UTCEPSS rescore
  16. 2026-07-26 11:45 UTCEG score recompute
  17. 2026-07-26 11:45 UTCGHSA enrichment
  18. 2026-07-25 14:18 UTCEPSS rescore
  19. 2026-07-25 14:18 UTCEPSS rescore
  20. 2026-07-24 14:18 UTCEPSS rescore
  21. 2026-07-24 14:18 UTCEPSS rescore
  22. 2026-07-23 14:18 UTCEPSS rescore
  23. 2026-07-23 14:18 UTCEPSS rescore
  24. 2026-07-23 03:22 UTCEG score recompute▲ 3.40
  25. 2026-07-22 14:08 UTCEPSS rescore
Show 14 more
  1. 2026-07-22 14:08 UTCEPSS rescore
  2. 2026-07-21 15:25 UTCEPSS rescore
  3. 2026-07-21 15:25 UTCEPSS rescore
  4. 2026-07-20 17:08 UTCEPSS rescore
  5. 2026-07-20 14:36 UTCNVD updateCVSS v3 → 9.8 · severity → CRITICAL
  6. 2026-07-19 14:31 UTCEPSS rescore
  7. 2026-07-19 02:29 UTCEPSS rescore
  8. 2026-07-18 10:04 UTCEPSS rescore
  9. 2026-07-16 17:03 UTCEPSS rescore
  10. 2026-07-16 15:57 UTCGHSA enrichment
  11. 2026-07-15 16:57 UTCEPSS rescore
  12. 2026-07-15 16:04 UTCGHSA enrichment
  13. 2026-07-14 16:11 UTCEG score recompute
  14. 2026-07-14 16:10 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-62644?
CVE-2026-62644 is a critical vulnerability 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 CVE-2026-62644 disclosed?
CVE-2026-62644 was first published in the National Vulnerability Database on July 14, 2026, with the most recent update on July 20, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-62644 actively exploited?
CVE-2026-62644 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 82.5% of all 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?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-62644, 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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