CVE-2026-27851

CRITICALNVD 9.19.1—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.1 under NVD CVSS v3. EPSS exploit probability: 0.4%, top 66% of all CVEs by exploit prediction. GitHub Security Advisory enrichment pending alignment with NVD CVSS.

Triggered by: NVD CVSS baseline
Sources: epss, ghsa, nvd
Trending — 4 sources updated this week
9.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.1Exploit: None knownExposed: 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
9.1(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
Severity91% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
33%
KEV
Not listed

Published

May 12, 2026

Last Modified

July 15, 2026

Advisory Details (4)

Auto-updated Aug 1, 2026
Patch available. Sources: redhat.
redhat

Affected: Red Hat Enterprise Linux 10",

https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-27851.json
redhat

2476471 – (CVE-2026-27851) CVE-2026-27851 dovecot: Dovecot: SQL/LDAP injection via incorrect safe filter interpretation with variable expansion

https://bugzilla.redhat.com/show_bug.cgi?id=2476471
redhat Patch Available

cve-details

https://access.redhat.com/security/cve/CVE-2026-27851
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 (1:2.3.21+dfsg1-2ubuntu6.5) @ noble2026-08-23ubuntu

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.

Affected Packages

(4 across 4 ecosystems)
Alpine:v3.23(1)
PackageVulnerable rangeFixed inDependents
dovecot—2.4.4-r0—
Alpine:v3.24(1)
PackageVulnerable rangeFixed inDependents
dovecot—2.4.4-r0—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
dovecot1:2.4.1+dfsg1-6 ... 1:2.4.1+dfsg1-6+deb13u5 (6 versions)1:2.4.1+dfsg1-6+deb13u6—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
dovecot1:2.4.1+dfsg1-6 ... 1:2.4.3+dfsg1-2 (10 versions)1:2.4.4+dfsg1-1—

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 8× in last 7d / 155× 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 347 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

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 15, 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 0% probability of exploitation in the next 30 days, which ranks it in the top 66.6% of all scored CVEs.
What is the CVSS score of CVE-2026-27851?
CVE-2026-27851 has a CVSS v3 base score of 9.1 (NVD).
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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