CVE-2026-42198

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.8%, top 48% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Trending — 3 sources updated this week
7.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 7.5Exploit: NoneExposed: 0

A fix is available — apply it.

pgjdbc is an open source postgresql JDBC Driver. From version 42.2.0 to before version 42.7.11, pgjdbc is vulnerable to a client-side denial of service during SCRAM-SHA-256 authentication. A malicious server can instruct the driver to perform SCRAM authentication with a very large iteration count. With a large enough value, the client spends an unbounded amount of CPU time inside PBKDF2 before authentication can fail. A single attempt ties up a CPU core. Repeated or concurrent attempts exhaust client CPU and can wedge connection pools. In affected versions, loginTimeout did not fully mitigate this problem. When loginTimeout expired, the caller could stop waiting, but the worker thread performing the connection attempt could continue running and burning CPU inside the SCRAM PBKDF2 computation. This issue has been patched in version 42.7.11.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
49(Track)
EG Risk 49/100SSVC: 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
Severity75% × 45%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
51.8%
KEV
Not listed

Published

April 29, 2026

Last Modified

July 15, 2026

Advisory Details (2)

Auto-updated Apr 29, 2026
Patch available. Sources: github.
github Patch Available

Unbounded PBKDF2 iterations in SCRAM authentication allows CPU exhaustion DoS · Advisory · pgjdbc/pgjdbc · GitHub

https://github.com/pgjdbc/pgjdbc/security/advisories/GHSA-98qh-xjc8-98pq
generic

Release v42.7.11 · pgjdbc/pgjdbc · GitHub

https://github.com/pgjdbc/pgjdbc/releases/tag/REL42.7.11

Vendor Advisories for CVE-2026-42198(4)

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

Patch Availability(4)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatpostgresql-jdbc-0:42.2.14-4.el8_102026-06-10redhat
redhatpostgresql-jdbc-0:42.7.2-1.el10_2.22026-06-08redhat
redhatpostgresql-jdbc-0:42.2.28-2.el9_8.22026-06-01redhat
redhatpgjdbc2026-05-20redhat

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

(1 across 1 ecosystem)
Maven(1)
PackageVulnerable rangeFixed inDependents
org.postgresql:postgresql42.2.0 ... 42.7.9 (125 versions)42.7.11—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 9× in last 7d / 35× 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 110 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-42198?
CVE-2026-42198 is a high vulnerability published on April 29, 2026. pgjdbc is an open source postgresql JDBC Driver. From version 42.2.0 to before version 42.7.11, pgjdbc is vulnerable to a client-side denial of service during SCRAM-SHA-256 authentication. A malicious server can instruct the driver to perform SCRAM authentication with a very large iteration count.…
When was CVE-2026-42198 disclosed?
CVE-2026-42198 was first published in the National Vulnerability Database on April 29, 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-2026-42198 actively exploited?
CVE-2026-42198 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 51.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-42198?
CVE-2026-42198 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-42198?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-42198, 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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