CVE-2026-33606

MEDIUMPre-NVD 4.84.8—
EchelonGraph scoreHIGH confidence

Score 4.8 from GitHub Security Advisory published 2026-08-28. a secondary CVSS source baseline 4.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
4.8EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 4.8Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Mail content stored by a user can be crafted so that it is interpreted as dsync protocol commands when an administrator later runs dsync with the stream protocol, for example during a migration. Injected commands can modify mailbox state on the destination during migration or replication, including internal mailbox attributes that a user should not be able to set directly. It can also cause dsync errors. Avoid running dsync with the stream protocol on mailboxes with untrusted content. Update to non-vulnerable version. No publicly available exploits are known.

CVSS v3
4.8
EG Score
4.8(high)
EG Risk
22(Track)
EG Risk 22/100SSVC: 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
Severity48% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
11%
KEV
Not listed

Published

August 28, 2026

Last Modified

September 3, 2026

Advisory Details (1)

Auto-updated Aug 28, 2026
No patch confirmed yet.
generic
https://documentation.open-xchange.com/dovecot/security/advisories/csaf/2026/oxdc-adv-2026-0003.json

Vendor Advisories for CVE-2026-33606(1)

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

Affected Packages

(5 across 5 ecosystems)
Alpine:v3.23(1)
PackageVulnerable rangeFixed inDependents
dovecot—2.4.5-r0—
Alpine:v3.24(1)
PackageVulnerable rangeFixed inDependents
dovecot—2.4.5-r0—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
dovecot1:2.3.19.1+dfsg1-2.1 ... 1:2.4.5+dfsg1-2 (42 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
dovecot1:2.4.1+dfsg1-6 ... 1:2.4.5+dfsg1-2 (20 versions)——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
dovecot1:2.4.1+dfsg1-6 ... 1:2.4.5+dfsg1-2 (14 versions)——

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 20× in last 7d / 65× 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. 2026-09-18 19:28 UTCEPSS rescore
  2. 2026-09-18 19:28 UTCEPSS rescore
  3. 2026-09-18 17:17 UTCEG score recompute
  4. 2026-09-18 17:17 UTCGHSA enrichment
  5. 2026-09-17 19:30 UTCEPSS rescore
  6. 2026-09-17 15:41 UTCEG score recompute
  7. 2026-09-17 15:41 UTCGHSA enrichment
  8. 2026-09-16 14:08 UTCEPSS rescore
  9. 2026-09-16 14:05 UTCEG score recompute
  10. 2026-09-16 14:05 UTCGHSA enrichment
  11. 2026-09-16 05:15 UTCEPSS rescore
  12. 2026-09-15 12:17 UTCEG score recompute
  13. 2026-09-15 12:17 UTCGHSA enrichment
  14. 2026-09-15 03:11 UTCEPSS rescore
  15. 2026-09-14 10:41 UTCEG score recompute
  16. 2026-09-14 10:41 UTCGHSA enrichment
  17. 2026-09-13 16:47 UTCEPSS rescore
  18. 2026-09-13 09:05 UTCEG score recompute
  19. 2026-09-13 09:05 UTCGHSA enrichment
  20. 2026-09-12 15:01 UTCEPSS rescore
  21. 2026-09-12 07:30 UTCEG score recompute
  22. 2026-09-12 07:30 UTCGHSA enrichment
  23. 2026-09-11 14:53 UTCEPSS rescore
  24. 2026-09-11 09:37 UTCEPSS rescore
  25. 2026-09-11 05:54 UTCEG score recompute
Show 40 more
  1. 2026-09-11 05:54 UTCGHSA enrichment
  2. 2026-09-10 09:34 UTCEPSS rescore
  3. 2026-09-10 04:18 UTCGHSA enrichment
  4. 2026-09-09 02:42 UTCEG score recompute
  5. 2026-09-09 02:42 UTCGHSA enrichment
  6. 2026-09-08 22:00 UTCEPSS rescore
  7. 2026-09-08 01:06 UTCEG score recompute
  8. 2026-09-08 01:06 UTCGHSA enrichment
  9. 2026-09-07 16:01 UTCEPSS rescore
  10. 2026-09-06 23:31 UTCEG score recompute
  11. 2026-09-06 23:31 UTCGHSA enrichment
  12. 2026-09-06 13:47 UTCEPSS rescore
  13. 2026-09-06 13:47 UTCEPSS rescore
  14. 2026-09-05 21:55 UTCEG score recompute
  15. 2026-09-05 21:55 UTCGHSA enrichment
  16. 2026-09-04 20:18 UTCEG score recompute
  17. 2026-09-04 20:17 UTCGHSA enrichment
  18. 2026-09-04 05:06 UTCEPSS rescore
  19. 2026-09-03 18:22 UTCGHSA enrichment
  20. 2026-09-03 04:21 UTCEG score recompute
  21. 2026-09-03 04:21 UTCGHSA enrichment
  22. 2026-09-02 14:11 UTCEPSS rescore
  23. 2026-09-02 02:45 UTCEG score recompute
  24. 2026-09-02 02:45 UTCGHSA enrichment
  25. 2026-09-01 13:53 UTCEPSS rescore
  26. 2026-09-01 04:39 UTCEPSS rescore
  27. 2026-09-01 04:39 UTCEPSS rescore
  28. 2026-09-01 01:08 UTCGHSA enrichment
  29. 2026-08-30 23:33 UTCEG score recompute
  30. 2026-08-30 23:33 UTCGHSA enrichment
  31. 2026-08-30 19:17 UTCEPSS rescore
  32. 2026-08-30 01:22 UTCEPSS rescore
  33. 2026-08-29 21:57 UTCGHSA enrichment
  34. 2026-08-28 20:21 UTCEG score recompute
  35. 2026-08-28 20:21 UTCGHSA enrichment
  36. 2026-08-28 19:45 UTCEG score recompute
  37. 2026-08-28 19:45 UTCGHSA enrichment
  38. 2026-08-28 12:23 UTCEG score recompute
  39. 2026-08-28 11:25 UTCEG score recompute
  40. 2026-08-28 11:19 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-33606?
CVE-2026-33606 is a medium vulnerability published on August 28, 2026. Mail content stored by a user can be crafted so that it is interpreted as dsync protocol commands when an administrator later runs dsync with the stream protocol, for example during a migration. Injected commands can modify mailbox state on the destination during migration or replication, including…
When was CVE-2026-33606 disclosed?
CVE-2026-33606 was first published in the National Vulnerability Database on August 28, 2026, with the most recent update on September 3, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-33606 actively exploited?
CVE-2026-33606 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 89.3% of all scored CVEs.
What is the CVSS score of CVE-2026-33606?
CVE-2026-33606 has a CVSS v3 base score of 4.8 (NVD).
How do I remediate CVE-2026-33606?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-33606, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-33606

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