CVE-2026-22185

MEDIUMPre-NVD 4.64.6
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

This medium-severity CVE scores 4.6 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2% (4th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from a secondary CVSS source
Sources: EPSS, a secondary CVSS source
Elevated

Also known asEUVD-2026-1169 (ENISA EUVD) · GHSA-gcc9-wqf3-69qj (GitHub Security Advisories)Source: ENISA EUVD

4.6EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 4.6Exploit: No code on recordExposed services: Not assessed

A fix is available — apply it.

OpenLDAP Lightning Memory-Mapped Database (LMDB) versions 0.9.14 before 0.9.34, prior to commit 8e1fda8, contain a heap buffer underflow in the readline() function of mdb_load. When processing malformed input containing an embedded NUL byte, an unsigned offset calculation can underflow and cause an out-of-bounds read of one byte before the allocated heap buffer. This can cause mdb_load to crash, leading to a limited denial-of-service condition.

CVSS
4.6
EG Score
4.6MEDIUMmedium confidence
EG Risk
37
EG Risk 37/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity46% × 45%
Impact severity (EG Severity): CVSS 4.6 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.2%
EPSS %ILE
4th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (4.6): severity, escalated by confirmed exploitation. This CVE's 4.6 is its impact severity (EG Severity), not escalated.

EG Severity
4.6 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.a secondary CVSS source
EG Likelihood
0.2% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-03). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Track* at high (mission-essential systems).CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

January 7, 2026

Last Modified

October 29, 2026

Advisory Details (5)

Auto-updated Aug 9, 2026
Patch available.
Web page

OpenLDAP <= 0.9.14 LMDB mdb_load Heap Buffer Underflow in readline() | Advisories | VulnCheck

https://www.vulncheck.com/advisories/openldap-lmdb-mdb-load-heap-buffer-underflow-in-readline
Web page

OpenLDAP, Main Page

https://www.openldap.org/
Web page

Full Disclosure: MongoDB v8.3.0 Integer Underflow in LMDB mdb_load

https://seclists.org/fulldisclosure/2026/Jan/8
Web page

Full Disclosure: MongoDB v8.3.0 Heap Buffer Underflow in OpenLDAP LMDB mdb_load

https://seclists.org/fulldisclosure/2026/Jan/5
Web page

10421 – mdb_load can crash on malicious input

https://bugs.openldap.org/show_bug.cgi?id=10421

Vendor Advisories for CVE-2026-22185(1)

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

Affected Packages

(8 across 4 ecosystems)
Debian:11(2)
PackageVulnerable rangeFix by version rangeDependents
lmdb0.9.24-1, 0.9.31-1, 0.9.35-1
  • every version on: no fix on record
—
openldap1:1.2.12-1 ... 2:1.2.12.1-1.0.1 (49 versions)
  • every version on: no fix on record
—
Debian:12(2)
PackageVulnerable rangeFix by version rangeDependents
lmdb0.9.24-1, 0.9.31-1, 0.9.35-1
  • every version on: no fix on record
—
openldap1:1.2.12-1 ... 2:1.2.12.1-1.0.1 (32 versions)
  • every version on: no fix on record
—
Debian:13(2)
PackageVulnerable rangeFix by version rangeDependents
lmdb0.9.31-1, 0.9.35-1
  • every version on: no fix on record
—
openldap1:1.2.12-1 ... 2:1.2.12.1-1.0.1 (7 versions)
  • every version on: no fix on record
—
Debian:14(2)
PackageVulnerable rangeFix by version rangeDependents
lmdb0.9.31-1
  • every version up to 0.9.35-1: fixed in 0.9.35-1
—
openldap1:1.2.12-1 ... 2:1.2.12.1-1.0.1 (7 versions)
  • every version on: no fix on record
—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 33× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed its CVE.org record (CNA or CISA ADP). An arrow marks a change the record states ("CVSS → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). "EchelonGraph re-scored" is our own recompute of this CVE's score, not an update from a source, and is not counted in the refreshes above. Most recent first.

Showing the most recent 100 of 225 rows on record for this CVE, as 99 entries (1 repeat merged).

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 1 repeat row among the latest 100 is merged into the row it repeats. The 125 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-12 16:33 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  2. 2026-11-11 16:39 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  3. 2026-11-10 16:43 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  4. 2026-11-09 16:34 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  5. 2026-11-08 16:38 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  6. 2026-11-07 16:38 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  7. 2026-11-06 16:37 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  8. 2026-11-05 16:37 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  9. 2026-11-04 16:35 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  10. 2026-11-04 01:55 UTCEchelonGraph re-scored
  11. 2026-11-04 01:55 UTCGHSA enrichmentGHSA-gcc9-wqf3-69qj · GitHub severity HIGH
  12. 2026-11-03 16:47 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  13. 2026-11-02 16:44 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  14. 2026-11-01 16:34 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  15. 2026-10-31 16:32 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  16. 2026-10-30 16:34 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  17. 2026-10-29 21:28 UTCEchelonGraph re-scored
  18. 2026-10-29 21:28 UTCGHSA enrichmentGHSA-gcc9-wqf3-69qj · GitHub severity HIGH
  19. 2026-10-29 20:28 UTCEchelonGraph re-scored
  20. 2026-10-29 20:28 UTCGHSA enrichmentGHSA-gcc9-wqf3-69qj · GitHub severity HIGH
  21. 2026-10-29 16:32 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  22. 2026-10-28 16:31 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  23. 2026-10-27 16:31 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  24. 2026-10-26 16:31 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  25. 2026-10-25 16:32 UTCEPSS rescoreEPSS 0.2% · 4th percentile
Show 74 more
  1. 2026-10-25 14:42 UTCEchelonGraph re-scored
  2. 2026-10-24 16:32 UTCEPSS rescoreEPSS 0.2% · 3rd percentile
  3. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  4. 2026-10-23 05:37 UTCEchelonGraph re-scored
  5. 2026-10-23 05:37 UTCGHSA enrichmentGHSA-gcc9-wqf3-69qj · GitHub severity HIGH
  6. 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.2% · 3rd percentile
  7. 2026-10-21 16:32 UTCEPSS rescoreEPSS 0.2% · 3rd percentile
  8. 2026-10-20 16:32 UTCEPSS rescoreEPSS 0.2% · 3rd percentile
  9. 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.2% · 3rd percentile
  10. 2026-10-18 16:31 UTCEPSS rescoreEPSS 0.2% · 3rd percentile
  11. 2026-10-18 03:55 UTCEchelonGraph re-scored
  12. 2026-10-16 16:41 UTCEPSS rescoreEPSS 0.2% · 3rd percentile
  13. 2026-10-15 16:31 UTCEPSS rescoreEPSS 0.2% · 3rd percentile
  14. 2026-10-14 16:32 UTCEPSS rescoreEPSS 0.2% · 3rd percentile
  15. 2026-10-13 16:33 UTCEPSS rescoreEPSS 0.2% · 3rd percentile
  16. 2026-10-12 16:22 UTCEchelonGraph re-scored
  17. 2026-10-11 20:04 UTCEchelonGraph re-scored
  18. 2026-10-11 17:17 UTCEchelonGraph re-scored
  19. 2026-10-11 14:49 UTCEchelonGraph re-scored
  20. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.2% · 3rd percentile
  21. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.2% · 3rd percentile
  22. 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.2% · 3rd percentile
  23. 2026-10-08 17:11 UTCEPSS rescoreEPSS 0.2% · 3rd percentile
  24. 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.2% · 3rd percentile
  25. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.2% · 3rd percentile
  26. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.2% · 3rd percentile
  27. 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.2% · 3rd percentile
  28. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  29. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  30. 2026-09-29 15:21 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  31. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  32. 2026-09-27 13:47 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  33. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  34. 2026-09-26 00:26 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  35. 2026-09-24 14:03 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  36. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  37. 2026-09-18 19:27 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  38. 2026-09-16 14:07 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  39. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  40. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  41. 2026-09-11 14:52 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  42. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  43. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  44. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  45. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  46. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  47. 2026-09-02 14:11 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  48. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  49. 2026-09-01 04:39 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  50. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  51. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  52. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  53. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  54. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  55. 2026-08-25 13:48 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  56. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  57. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  58. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  59. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  60. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  61. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  62. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  63. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  64. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  65. 2026-08-14 15:42 UTCEchelonGraph re-scored
  66. 2026-08-14 15:42 UTCGHSA enrichmentGHSA-gcc9-wqf3-69qj · GitHub severity HIGH
  67. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  68. 2026-08-12 13:50 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  69. 2026-08-11 13:42 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  70. 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  71. 2026-08-09 21:18 UTCEchelonGraph re-scored
  72. 2026-08-09 21:18 UTCGHSA enrichmentGHSA-gcc9-wqf3-69qj · GitHub severity HIGH
  73. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  74. 2026-08-08 16:37 UTCEPSS rescoreEPSS 0.1% · 3rd percentile

Frequently asked(5)

What is CVE-2026-22185?
CVE-2026-22185 is a medium-severity vulnerability; its CVE record was published on January 7, 2026. OpenLDAP Lightning Memory-Mapped Database (LMDB) versions 0.9.14 before 0.9.34, prior to commit 8e1fda8, contain a heap buffer underflow in the readline() function of mdb_load. When processing malformed input containing an embedded NUL byte, an unsigned offset calculation can underflow and cause an…
When was the CVE record for CVE-2026-22185 published?
The CVE record for CVE-2026-22185 was published on January 7, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of October 29, 2026; the record at its source may have been updated since.
Is CVE-2026-22185 actively exploited?
CVE-2026-22185 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (4th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-22185?
CVE-2026-22185 has a CVSS base score of 4.6 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-22185?
A fix for CVE-2026-22185 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-22185 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-22185

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