CVE-2026-27851

CRITICALNVD 9.17.4▼
EchelonGraph scoreMEDIUM confidence

Score 7.4 from GitHub Security Advisory (severity: HIGH) published 2026-05-12. NVD baseline CVSS 7.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
9.1
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 9.1Exploit: NoneExposed: 0

A fix is available — apply it.

When safe filter is used with variable expansion, all following pipelines on the same string are incorrectly interpreted as safe too, enabling unsafe data to be unescaped. This can enable SQL / LDAP injection attacks when used in authentication. Avoid using safe filter until on fixed version. No publicly available exploits are known.

CVSS v3
9.1
EG Score
7.4(medium)
EPSS
32.6%
KEV
Not listed

Published

May 12, 2026

Last Modified

July 10, 2026

Advisory Details (1)

Auto-updated May 18, 2026
No patch confirmed yet.
generic
https://documentation.open-xchange.com/dovecot/security/advisories/csaf/2026/oxdc-adv-2026-0002.json

Vendor Advisories for CVE-2026-27851(1)

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

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntudovecot-submissiond (1:2.4.2+dfsg1-3ubuntu2.1) @ resolute2026-06-28ubuntu

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(2)

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

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 11× in last 7d / 84× 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 193 total refreshes for this CVE.

  1. 2026-07-11 08:27 UTCEPSS rescore
  2. 2026-07-10 12:26 UTCNVD updateCVSS v3 → 9.1 · severity → CRITICAL
  3. 2026-07-10 12:12 UTCMITRE cvelistV5CVSS v3 → 7.4 · severity → HIGH
  4. 2026-07-09 19:10 UTCEPSS rescore
  5. 2026-07-08 15:15 UTCEPSS rescore
  6. 2026-07-07 13:46 UTCEPSS rescore
  7. 2026-07-06 16:27 UTCEPSS rescore
  8. 2026-07-06 16:27 UTCEPSS rescore
  9. 2026-07-06 02:23 UTCEPSS rescore
  10. 2026-07-06 02:23 UTCEPSS rescore
  11. 2026-07-05 02:30 UTCEPSS rescore
  12. 2026-07-04 06:31 UTCEPSS rescore
  13. 2026-07-04 06:31 UTCEPSS rescore
  14. 2026-07-01 15:06 UTCEPSS rescore
  15. 2026-07-01 15:06 UTCEPSS rescore
  16. 2026-06-30 23:22 UTCEPSS rescore
  17. 2026-06-30 23:22 UTCEPSS rescore
  18. 2026-06-30 04:33 UTCNVD updateCVSS v3 → 9.1 · severity → CRITICAL
  19. 2026-06-29 14:06 UTCEPSS rescore
  20. 2026-06-28 14:07 UTCEPSS rescore
  21. 2026-06-28 14:07 UTCEPSS rescore
  22. 2026-06-28 04:56 UTCEPSS rescore
  23. 2026-06-28 04:56 UTCEPSS rescore
  24. 2026-06-28 02:25 UTCEG score recompute
  25. 2026-06-28 02:25 UTCVendor advisory
Show 75 more
  1. 2026-06-28 02:25 UTCGHSA enrichment
  2. 2026-06-27 09:31 UTCEG score recompute
  3. 2026-06-27 09:31 UTCVendor advisory
  4. 2026-06-27 09:31 UTCGHSA enrichment
  5. 2026-06-27 03:08 UTCEPSS rescore
  6. 2026-06-26 20:57 UTCEG score recompute
  7. 2026-06-26 20:57 UTCVendor advisory
  8. 2026-06-26 20:56 UTCGHSA enrichment
  9. 2026-06-25 23:28 UTCEG score recompute
  10. 2026-06-25 23:28 UTCVendor advisory
  11. 2026-06-25 23:27 UTCGHSA enrichment
  12. 2026-06-25 13:49 UTCEPSS rescore
  13. 2026-06-25 13:49 UTCEPSS rescore
  14. 2026-06-24 14:05 UTCEPSS rescore
  15. 2026-06-24 14:05 UTCEPSS rescore
  16. 2026-06-23 21:33 UTCEPSS rescore
  17. 2026-06-23 21:32 UTCEPSS rescore
  18. 2026-06-22 14:25 UTCEPSS rescore
  19. 2026-06-22 14:25 UTCEPSS rescore
  20. 2026-06-21 14:56 UTCEPSS rescore
  21. 2026-06-21 14:56 UTCEPSS rescore
  22. 2026-06-21 01:59 UTCEPSS rescore
  23. 2026-06-21 01:59 UTCEPSS rescore
  24. 2026-06-19 19:25 UTCEPSS rescore
  25. 2026-06-19 19:25 UTCEPSS rescore
  26. 2026-06-18 17:52 UTCEPSS rescore
  27. 2026-06-17 17:53 UTCEPSS rescore
  28. 2026-06-17 17:53 UTCEPSS rescore
  29. 2026-06-17 00:35 UTCEG score recompute
  30. 2026-06-17 00:35 UTCVendor advisory
  31. 2026-06-17 00:35 UTCGHSA enrichment
  32. 2026-06-16 17:52 UTCEPSS rescore
  33. 2026-06-16 06:50 UTCEG score recompute
  34. 2026-06-16 06:50 UTCVendor advisory
  35. 2026-06-16 06:49 UTCGHSA enrichment
  36. 2026-06-15 17:48 UTCEPSS rescore
  37. 2026-06-15 01:42 UTCEG score recompute
  38. 2026-06-15 01:42 UTCVendor advisory
  39. 2026-06-15 01:42 UTCGHSA enrichment
  40. 2026-06-14 23:18 UTCEPSS rescore
  41. 2026-06-14 13:27 UTCEG score recompute
  42. 2026-06-14 13:27 UTCVendor advisory
  43. 2026-06-14 13:27 UTCGHSA enrichment
  44. 2026-06-14 01:05 UTCEG score recompute
  45. 2026-06-14 01:05 UTCVendor advisory
  46. 2026-06-14 01:05 UTCGHSA enrichment
  47. 2026-06-13 23:00 UTCEPSS rescore
  48. 2026-06-13 01:04 UTCEG score recompute
  49. 2026-06-13 01:04 UTCVendor advisory
  50. 2026-06-13 01:04 UTCGHSA enrichment
  51. 2026-06-13 00:57 UTCGHSA enrichment
  52. 2026-06-12 23:12 UTCEPSS rescore
  53. 2026-06-12 23:12 UTCEPSS rescore
  54. 2026-06-12 12:41 UTCEG score recompute
  55. 2026-06-12 12:41 UTCVendor advisory
  56. 2026-06-12 12:41 UTCGHSA enrichment
  57. 2026-06-12 00:27 UTCEG score recompute
  58. 2026-06-12 00:27 UTCVendor advisory
  59. 2026-06-12 00:27 UTCGHSA enrichment
  60. 2026-06-11 14:00 UTCEPSS rescore
  61. 2026-06-11 12:12 UTCEG score recompute
  62. 2026-06-11 12:12 UTCVendor advisory
  63. 2026-06-11 12:12 UTCGHSA enrichment
  64. 2026-06-10 23:55 UTCEG score recompute
  65. 2026-06-10 23:55 UTCVendor advisory
  66. 2026-06-10 23:55 UTCGHSA enrichment
  67. 2026-06-10 22:18 UTCEPSS rescore
  68. 2026-06-10 22:18 UTCEPSS rescore
  69. 2026-06-10 13:22 UTCEPSS rescore
  70. 2026-06-10 11:11 UTCEG score recompute
  71. 2026-06-10 11:11 UTCVendor advisory
  72. 2026-06-10 11:11 UTCGHSA enrichment
  73. 2026-06-09 22:56 UTCEG score recompute
  74. 2026-06-09 22:56 UTCVendor advisory
  75. 2026-06-09 22:56 UTCGHSA enrichment

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Frequently asked(5)

What is CVE-2026-27851?
CVE-2026-27851 is a critical vulnerability published on May 12, 2026. When safe filter is used with variable expansion, all following pipelines on the same string are incorrectly interpreted as safe too, enabling unsafe data to be unescaped. This can enable SQL / LDAP injection attacks when used in authentication. Avoid using safe filter until on fixed version. No…
When was CVE-2026-27851 disclosed?
CVE-2026-27851 was first published in the National Vulnerability Database on May 12, 2026, with the most recent update on July 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-27851 actively exploited?
CVE-2026-27851 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 32.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-27851?
CVE-2026-27851 has a CVSS v3 base score of 9.1 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 7.4.
How do I remediate CVE-2026-27851?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-27851, 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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