CVE-2026-75006

MEDIUMPre-NVD 5.85.8—
EchelonGraph scoreMEDIUM confidence

Score 5.8 from GitHub Security Advisory published 2026-08-17. a secondary CVSS source baseline 5.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
5.8EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.8Exploit: 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 1.6.18 and 1.7.x before 1.7.3, 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. This issue exists because of insufficient fixes for CVE-2026-35540, CVE-2026-48843 and CVE-2026-62643.

CVSS v3
5.8
EG Score
5.8(medium)
EG Risk
41(Track)
EG Risk 41/100SSVC: 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
Severity58% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
36%
KEV
Not listed

Published

August 17, 2026

Last Modified

September 8, 2026

Advisory Details (5)

Auto-updated Aug 17, 2026
Upstream fix merged — awaiting tagged release. Sources: github_commit.
generic

Security updates 1.6.18 and 1.7.3 released

https://roundcube.net/news/2026/08/09/security-updates-1.6.18-and-1.7.3
github_commit

commit c111b72950cd (roundcube/roundcubemail)

Fix landed in roundcube/roundcubemail commit c111b72950cd — awaiting tagged release

https://github.com/roundcube/roundcubemail/commit/c111b72950cd2bf57d6b86cd129568d90403322d
github_commit

commit 92f85c883594 (roundcube/roundcubemail)

Fix landed in roundcube/roundcubemail commit 92f85c883594 — awaiting tagged release

https://github.com/roundcube/roundcubemail/commit/92f85c883594e5be757154f94548a9ba903455c9
github_commit

commit 8a92380b06b5 (roundcube/roundcubemail)

Fix landed in roundcube/roundcubemail commit 8a92380b06b5 — awaiting tagged release

https://github.com/roundcube/roundcubemail/commit/8a92380b06b5df1481e034c4f40d6a6546c21223
github_commit

commit 7e10ca0110b7 (roundcube/roundcubemail)

Fix landed in roundcube/roundcubemail commit 7e10ca0110b7 — awaiting tagged release

https://github.com/roundcube/roundcubemail/commit/7e10ca0110b7c9aa1b7850b843bb6625e47bbe00

Vendor Advisories for CVE-2026-75006(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFixed inDependents
roundcube1.6.1+dfsg-1 ... 1.6.5+dfsg-1~deb12u1 (18 versions)1.6.5+dfsg-1+deb12u11—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
roundcube1.6.11+dfsg-1 ... 1.6.17+dfsg-1 (12 versions)1.6.18+dfsg-0+deb13u1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
roundcube1.6.11+dfsg-1 ... 1.6.17+dfsg-1 (7 versions)1.6.18+dfsg-1—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 19× in last 7d / 83× 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. 2026-09-20 20:16 UTCEPSS rescore
  2. 2026-09-20 14:15 UTCEG score recompute
  3. 2026-09-20 14:15 UTCGHSA enrichment
  4. 2026-09-19 13:43 UTCEG score recompute
  5. 2026-09-19 13:43 UTCGHSA enrichment
  6. 2026-09-18 19:28 UTCEPSS rescore
  7. 2026-09-18 14:27 UTCEG score recompute
  8. 2026-09-18 14:27 UTCGHSA enrichment
  9. 2026-09-17 14:51 UTCEG score recompute
  10. 2026-09-17 14:51 UTCGHSA enrichment
  11. 2026-09-16 15:17 UTCEG score recompute
  12. 2026-09-16 15:17 UTCGHSA enrichment
  13. 2026-09-16 14:08 UTCEPSS rescore
  14. 2026-09-16 05:15 UTCEPSS rescore
  15. 2026-09-15 15:19 UTCEG score recompute
  16. 2026-09-15 15:19 UTCGHSA enrichment
  17. 2026-09-15 03:12 UTCEPSS rescore
  18. 2026-09-14 15:44 UTCEG score recompute
  19. 2026-09-14 15:44 UTCGHSA enrichment
  20. 2026-09-13 16:28 UTCGHSA enrichment
  21. 2026-09-12 17:12 UTCEG score recompute
  22. 2026-09-12 17:12 UTCGHSA enrichment
  23. 2026-09-12 15:02 UTCEPSS rescore
  24. 2026-09-11 17:56 UTCEG score recompute
  25. 2026-09-11 17:56 UTCGHSA enrichment
Show 75 more
  1. 2026-09-11 14:53 UTCEPSS rescore
  2. 2026-09-10 18:40 UTCEG score recompute
  3. 2026-09-10 18:40 UTCGHSA enrichment
  4. 2026-09-10 09:35 UTCEPSS rescore
  5. 2026-09-09 19:21 UTCEG score recompute
  6. 2026-09-09 19:21 UTCGHSA enrichment
  7. 2026-09-08 22:01 UTCEPSS rescore
  8. 2026-09-08 20:05 UTCGHSA enrichment
  9. 2026-09-07 19:44 UTCEG score recompute
  10. 2026-09-07 19:44 UTCGHSA enrichment
  11. 2026-09-06 20:28 UTCEG score recompute
  12. 2026-09-06 20:28 UTCGHSA enrichment
  13. 2026-09-06 13:48 UTCEPSS rescore
  14. 2026-09-05 21:11 UTCEG score recompute
  15. 2026-09-05 21:11 UTCGHSA enrichment
  16. 2026-09-04 21:55 UTCEG score recompute
  17. 2026-09-04 21:55 UTCGHSA enrichment
  18. 2026-09-04 05:07 UTCEPSS rescore
  19. 2026-09-03 22:37 UTCGHSA enrichment
  20. 2026-09-02 22:11 UTCEG score recompute
  21. 2026-09-02 22:10 UTCGHSA enrichment
  22. 2026-09-02 14:12 UTCEPSS rescore
  23. 2026-09-01 21:10 UTCEG score recompute
  24. 2026-09-01 21:10 UTCGHSA enrichment
  25. 2026-09-01 13:54 UTCEPSS rescore
  26. 2026-09-01 06:01 UTCEG score recompute
  27. 2026-09-01 06:00 UTCGHSA enrichment
  28. 2026-09-01 04:40 UTCEPSS rescore
  29. 2026-09-01 04:40 UTCEPSS rescore
  30. 2026-08-31 06:20 UTCEG score recompute
  31. 2026-08-31 06:20 UTCGHSA enrichment
  32. 2026-08-30 19:18 UTCEPSS rescore
  33. 2026-08-30 19:17 UTCEPSS rescore
  34. 2026-08-30 06:56 UTCEG score recompute
  35. 2026-08-30 06:56 UTCGHSA enrichment
  36. 2026-08-30 01:22 UTCEPSS rescore
  37. 2026-08-29 07:39 UTCEG score recompute
  38. 2026-08-29 07:39 UTCGHSA enrichment
  39. 2026-08-28 21:42 UTCEPSS rescore
  40. 2026-08-28 08:18 UTCEG score recompute
  41. 2026-08-28 08:18 UTCGHSA enrichment
  42. 2026-08-27 14:25 UTCEPSS rescore
  43. 2026-08-27 09:00 UTCEG score recompute
  44. 2026-08-27 09:00 UTCGHSA enrichment
  45. 2026-08-26 14:47 UTCEPSS rescore
  46. 2026-08-26 09:43 UTCEG score recompute
  47. 2026-08-26 09:43 UTCGHSA enrichment
  48. 2026-08-25 13:49 UTCEPSS rescore
  49. 2026-08-25 10:24 UTCEG score recompute
  50. 2026-08-25 10:23 UTCGHSA enrichment
  51. 2026-08-24 14:18 UTCEPSS rescore
  52. 2026-08-24 11:07 UTCEG score recompute
  53. 2026-08-24 11:07 UTCGHSA enrichment
  54. 2026-08-23 11:51 UTCEG score recompute
  55. 2026-08-23 11:51 UTCGHSA enrichment
  56. 2026-08-23 00:19 UTCEPSS rescore
  57. 2026-08-22 12:35 UTCEG score recompute
  58. 2026-08-22 12:35 UTCGHSA enrichment
  59. 2026-08-21 23:49 UTCEPSS rescore
  60. 2026-08-21 13:18 UTCEG score recompute
  61. 2026-08-21 13:18 UTCGHSA enrichment
  62. 2026-08-20 22:56 UTCEPSS rescore
  63. 2026-08-20 14:01 UTCEG score recompute
  64. 2026-08-20 14:01 UTCGHSA enrichment
  65. 2026-08-19 17:04 UTCEPSS rescore
  66. 2026-08-19 14:12 UTCGHSA enrichment
  67. 2026-08-18 14:56 UTCEG score recompute
  68. 2026-08-18 14:56 UTCGHSA enrichment
  69. 2026-08-18 13:49 UTCEPSS rescore
  70. 2026-08-18 13:49 UTCEPSS rescore
  71. 2026-08-17 14:22 UTCEG score recompute
  72. 2026-08-17 14:17 UTCEG score recompute
  73. 2026-08-17 13:30 UTCEG score recompute
  74. 2026-08-17 13:16 UTCEG score recompute
  75. 2026-08-17 13:16 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-75006?
CVE-2026-75006 is a medium vulnerability published on August 17, 2026. In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, 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. This issue exists because of insufficient fixes for…
When was CVE-2026-75006 disclosed?
CVE-2026-75006 was first published in the National Vulnerability Database on August 17, 2026, with the most recent update on September 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-75006 actively exploited?
CVE-2026-75006 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 64.4% of all scored CVEs.
What is the CVSS score of CVE-2026-75006?
CVE-2026-75006 has a CVSS v3 base score of 5.8 (NVD).
How do I remediate CVE-2026-75006?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-75006, 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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