CVE-2026-74997

HIGHPre-NVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-08-17. A secondary CVSS source baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1.1%CVSS: 8.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, the cmd_learn driver of the markasjunk plugin is subject to remote code execution via crafted placeholder replacement values. This issue only affects Roundcube instances using the markasjunk plugin with its cmd_learn driver.

CVSS v3
8.8
EG Score
8.8HIGHmedium confidence
EG Risk
40
EG Risk 40/100CISA SSVC

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
Severity88% × 45%
Exploitation1% × 40%
Automatability0% × 15%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
1.1%
EPSS %ILE
65th
KEV
Not listed

CISA SSVCTrack 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). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 17, 2026

Last Modified

September 8, 2026

Advisory Details (6)

Auto-updated Aug 17, 2026
Patch available. Sources: github_release, github_commit.
github_commit

commit 14044f843cfa (roundcube/roundcubemail)

Fix landed in roundcube/roundcubemail commit 14044f843cfa — awaiting tagged release

https://github.com/roundcube/roundcubemail/commit/14044f843cfacbe78b042f659e379d6b4497aa7c
github_release Patch Available

Roundcube Webmail 1.7.3

Patch available: roundcube/roundcubemail 1.7.3

https://github.com/roundcube/roundcubemail/releases/tag/1.7.3
github_commit

commit 495d211638f2 (roundcube/roundcubemail)

Fix landed in roundcube/roundcubemail commit 495d211638f2 — awaiting tagged release

https://github.com/roundcube/roundcubemail/commit/495d211638f222336b20f4744545c53712426c2a
github_commit

commit b8f90e28a46d (roundcube/roundcubemail)

Fix landed in roundcube/roundcubemail commit b8f90e28a46d — awaiting tagged release

https://github.com/roundcube/roundcubemail/commit/b8f90e28a46d42e79a69568cba897f8f4223d9cd
github_release Patch Available

Roundcube Webmail 1.6.18

Patch available: roundcube/roundcubemail 1.6.18

https://github.com/roundcube/roundcubemail/releases/tag/1.6.18
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-2026-74997(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 rangeFix by version rangeDependents
roundcube1.6.1+dfsg-1 ... 1.6.5+dfsg-1~deb12u1 (18 versions)
  • every version up to 1.6.5+dfsg-1+deb12u11: fixed in 1.6.5+dfsg-1+deb12u11
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
roundcube1.6.11+dfsg-1 ... 1.6.17+dfsg-1 (12 versions)
  • every version up to 1.6.18+dfsg-0+deb13u1: fixed in 1.6.18+dfsg-0+deb13u1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
roundcube1.6.11+dfsg-1 ... 1.6.17+dfsg-1 (7 versions)
  • every version up to 1.6.18+dfsg-1: fixed in 1.6.18+dfsg-1
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 20× in last 7d / 99× 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.

Showing the most recent 100 of 177 total refreshes for this CVE.

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

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-74997?
CVE-2026-74997 is a high vulnerability published on August 17, 2026. In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, the cmdlearn driver of the markasjunk plugin is subject to remote code execution via crafted placeholder replacement values. This issue only affects Roundcube instances using the markasjunk plugin with its cmdlearn driver.
When was CVE-2026-74997 disclosed?
CVE-2026-74997 was first published 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-2026-74997 actively exploited?
CVE-2026-74997 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.1% probability of exploitation in the next 30 days (65th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-74997?
CVE-2026-74997 has a CVSS base score of 8.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-74997?
A fix for CVE-2026-74997 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-74997 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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