CVE-2026-75004

MEDIUMPre-NVD 4.34.3—
EchelonGraph scoreMEDIUM confidence

Score 4.3 from GitHub Security Advisory published 2026-08-17. a secondary CVSS source baseline 4.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
4.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 4.3Exploit: 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, improper rule name quoting could lead to managesieve_disabled_actions setting bypass via a crafted rule name in a Sieve script. This issue only affects Roundcube instances using the managesieve plugin.

CVSS v3
4.3
EG Score
4.3(medium)
EG Risk
19(Track)
EG Risk 19/100SSVC: 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
Severity43% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
20%
KEV
Not listed

Published

August 17, 2026

Last Modified

September 8, 2026

Advisory Details (1)

Auto-updated Aug 17, 2026
No patch confirmed yet.
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

Vendor Advisories for CVE-2026-75004(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 17× in last 7d / 80× 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. 2026-09-21 10:13 UTCEG score recompute
  2. 2026-09-21 10:13 UTCGHSA enrichment
  3. 2026-09-20 20:16 UTCEPSS rescore
  4. 2026-09-20 09:46 UTCGHSA enrichment
  5. 2026-09-19 06:15 UTCEG score recompute
  6. 2026-09-19 06:15 UTCGHSA enrichment
  7. 2026-09-18 19:28 UTCEPSS rescore
  8. 2026-09-18 05:49 UTCEG score recompute
  9. 2026-09-18 05:49 UTCGHSA enrichment
  10. 2026-09-17 05:22 UTCEG score recompute
  11. 2026-09-17 05:22 UTCGHSA enrichment
  12. 2026-09-16 14:08 UTCEPSS rescore
  13. 2026-09-16 05:15 UTCEPSS rescore
  14. 2026-09-16 04:55 UTCGHSA enrichment
  15. 2026-09-15 03:31 UTCEG score recompute
  16. 2026-09-15 03:31 UTCGHSA enrichment
  17. 2026-09-15 03:12 UTCEPSS rescore
  18. 2026-09-14 03:03 UTCEG score recompute
  19. 2026-09-14 03:03 UTCGHSA enrichment
  20. 2026-09-13 02:36 UTCEG score recompute
  21. 2026-09-13 02:36 UTCGHSA enrichment
  22. 2026-09-12 15:02 UTCEPSS rescore
  23. 2026-09-12 02:09 UTCEG score recompute
  24. 2026-09-12 02:09 UTCGHSA enrichment
  25. 2026-09-11 14:53 UTCEPSS rescore
Show 72 more
  1. 2026-09-11 01:41 UTCEG score recompute
  2. 2026-09-11 01:41 UTCGHSA enrichment
  3. 2026-09-10 09:35 UTCEPSS rescore
  4. 2026-09-10 01:15 UTCEG score recompute
  5. 2026-09-10 01:15 UTCGHSA enrichment
  6. 2026-09-08 22:01 UTCEPSS rescore
  7. 2026-09-08 20:05 UTCGHSA enrichment
  8. 2026-09-08 01:38 UTCEG score recompute
  9. 2026-09-08 01:37 UTCGHSA enrichment
  10. 2026-09-07 01:11 UTCEG score recompute
  11. 2026-09-07 01:10 UTCGHSA enrichment
  12. 2026-09-06 13:48 UTCEPSS rescore
  13. 2026-09-06 00:43 UTCEG score recompute
  14. 2026-09-06 00:43 UTCGHSA enrichment
  15. 2026-09-05 00:14 UTCEG score recompute
  16. 2026-09-05 00:14 UTCGHSA enrichment
  17. 2026-09-04 05:07 UTCEPSS rescore
  18. 2026-09-03 22:37 UTCGHSA enrichment
  19. 2026-09-02 22:11 UTCEG score recompute
  20. 2026-09-02 22:10 UTCGHSA enrichment
  21. 2026-09-02 14:12 UTCEPSS rescore
  22. 2026-09-01 21:10 UTCEG score recompute
  23. 2026-09-01 21:10 UTCGHSA enrichment
  24. 2026-09-01 13:54 UTCEPSS rescore
  25. 2026-09-01 07:05 UTCEG score recompute
  26. 2026-09-01 07:05 UTCGHSA enrichment
  27. 2026-09-01 04:40 UTCEPSS rescore
  28. 2026-09-01 04:40 UTCEPSS rescore
  29. 2026-08-31 06:36 UTCEG score recompute
  30. 2026-08-31 06:36 UTCGHSA enrichment
  31. 2026-08-30 19:18 UTCEPSS rescore
  32. 2026-08-30 19:17 UTCEPSS rescore
  33. 2026-08-30 06:09 UTCEG score recompute
  34. 2026-08-30 06:08 UTCGHSA enrichment
  35. 2026-08-30 01:22 UTCEPSS rescore
  36. 2026-08-29 05:39 UTCEG score recompute
  37. 2026-08-29 05:39 UTCGHSA enrichment
  38. 2026-08-28 21:42 UTCEPSS rescore
  39. 2026-08-27 19:57 UTCEG score recompute
  40. 2026-08-27 19:57 UTCGHSA enrichment
  41. 2026-08-27 14:25 UTCEPSS rescore
  42. 2026-08-26 19:31 UTCEG score recompute
  43. 2026-08-26 19:31 UTCGHSA enrichment
  44. 2026-08-26 14:47 UTCEPSS rescore
  45. 2026-08-25 19:03 UTCEG score recompute
  46. 2026-08-25 19:03 UTCGHSA enrichment
  47. 2026-08-25 13:49 UTCEPSS rescore
  48. 2026-08-24 18:35 UTCEG score recompute
  49. 2026-08-24 18:35 UTCGHSA enrichment
  50. 2026-08-24 14:18 UTCEPSS rescore
  51. 2026-08-23 18:09 UTCEG score recompute
  52. 2026-08-23 18:09 UTCGHSA enrichment
  53. 2026-08-23 00:19 UTCEPSS rescore
  54. 2026-08-22 17:42 UTCEG score recompute
  55. 2026-08-22 17:42 UTCGHSA enrichment
  56. 2026-08-21 23:49 UTCEPSS rescore
  57. 2026-08-21 17:14 UTCEG score recompute
  58. 2026-08-21 17:14 UTCGHSA enrichment
  59. 2026-08-20 22:56 UTCEPSS rescore
  60. 2026-08-20 16:47 UTCEG score recompute
  61. 2026-08-20 16:47 UTCGHSA enrichment
  62. 2026-08-19 17:04 UTCEPSS rescore
  63. 2026-08-19 16:14 UTCGHSA enrichment
  64. 2026-08-18 15:47 UTCEG score recompute
  65. 2026-08-18 15:47 UTCGHSA enrichment
  66. 2026-08-18 13:49 UTCEPSS rescore
  67. 2026-08-18 13:49 UTCEPSS rescore
  68. 2026-08-17 15:20 UTCEG score recompute
  69. 2026-08-17 14:44 UTCEG score recompute
  70. 2026-08-17 13:30 UTCEG score recompute
  71. 2026-08-17 13:16 UTCEG score recompute
  72. 2026-08-17 13:16 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-75004?
CVE-2026-75004 is a medium vulnerability published on August 17, 2026. In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, improper rule name quoting could lead to managesievedisabledactions setting bypass via a crafted rule name in a Sieve script. This issue only affects Roundcube instances using the managesieve plugin.
When was CVE-2026-75004 disclosed?
CVE-2026-75004 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-2026-75004 actively exploited?
CVE-2026-75004 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 80.0% of all scored CVEs.
What is the CVSS score of CVE-2026-75004?
CVE-2026-75004 has a CVSS v3 base score of 4.3 (NVD).
How do I remediate CVE-2026-75004?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-75004, 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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