CVE-2026-54291

MEDIUMNVD 5.95.9—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.9 under NVD CVSS v3. EPSS exploit probability: 0.2%, top 86% 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, nvd
Trending — 3 sources updated this week
5.9EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.9Exploit: None knownExposed: 0

A fix is available — apply it.

pgjdbc is an open source postgresql JDBC Driver. In releases 42.7.4 through 42.7.11, channelBinding=require connections can be silently downgraded from SCRAM-SHA-256-PLUS with channel binding to plain SCRAM-SHA-256 without it, losing the man-in-the-middle protection the setting is meant to guarantee. An attacker who can intercept the TLS connection can trigger the downgrade with a certificate whose signature algorithm has no tls-server-end-point channel-binding hash, because the bundled com.ongres.scram:scram-client returns an empty byte array instead of failing and pgJDBC ScramAuthenticator checks only that the server advertised a PLUS mechanism, without rejecting the empty binding or checking that the negotiated mechanism uses channel binding. This issue is fixed in version 42.7.12.

CVSS v3
5.9
EG Score
5.9(medium)
EG Risk
27(Track)
EG Risk 27/100SSVC: 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
Severity59% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
14%
KEV
Not listed

Published

July 6, 2026

Last Modified

July 9, 2026

Advisory Details (3)

Auto-updated Jul 6, 2026
Patch available. Sources: github_release, github_commit, github.
github Patch Available

Silent channel-binding authentication downgrade via unsupported certificate algorithms · Advisory · pgjdbc/pgjdbc · GitHub

https://github.com/pgjdbc/pgjdbc/security/advisories/GHSA-j92g-9f8w-j867
github_commit Patch Available

commit 77df98e4e66c (pgjdbc/pgjdbc)

Patch available: pgjdbc/pgjdbc REL42.7.12 (contains commit 77df98e4e66c)

https://github.com/pgjdbc/pgjdbc/commit/77df98e4e66c12936ded3478a0954f6f580bad99
github_release Patch Available

SCRAM Java 3.3

Patch available: ongres/scram 3.3

https://github.com/ongres/scram/releases/tag/3.3

Vendor Advisories for CVE-2026-54291(3)

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
redhatpostgresql2026-08-13redhat

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

(5 across 5 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
libpgjava42.2.15-1 ... 42.7.9-1 (39 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
libpgjava42.5.4-1 ... 42.7.9-1 (21 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
libpgjava42.7.10-1 ... 42.7.9-1 (9 versions)——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
libpgjava42.7.10-1 ... 42.7.9-1 (7 versions)42.7.12-1—
Maven(1)
PackageVulnerable rangeFixed inDependents
org.postgresql:postgresql42.7.10 ... 42.7.9 (8 versions)42.7.12—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 16× in last 7d / 59× 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. 2026-08-24 20:48 UTCEG score recompute
  2. 2026-08-24 20:48 UTCVendor advisory
  3. 2026-08-23 18:47 UTCEG score recompute
  4. 2026-08-23 18:47 UTCVendor advisory
  5. 2026-08-23 00:19 UTCEPSS rescore
  6. 2026-08-22 18:01 UTCEG score recompute
  7. 2026-08-22 18:01 UTCVendor advisory
  8. 2026-08-21 23:49 UTCEPSS rescore
  9. 2026-08-21 17:03 UTCEG score recompute
  10. 2026-08-21 17:03 UTCVendor advisory
  11. 2026-08-20 22:55 UTCEPSS rescore
  12. 2026-08-20 15:48 UTCEG score recompute
  13. 2026-08-20 15:48 UTCVendor advisory
  14. 2026-08-19 17:04 UTCEPSS rescore
  15. 2026-08-19 12:30 UTCEG score recompute
  16. 2026-08-19 12:30 UTCVendor advisory
  17. 2026-08-18 13:48 UTCEPSS rescore
  18. 2026-08-18 10:58 UTCEG score recompute
  19. 2026-08-18 10:58 UTCVendor advisory
  20. 2026-08-17 13:47 UTCEPSS rescore
  21. 2026-08-17 09:24 UTCEG score recompute
  22. 2026-08-17 09:24 UTCVendor advisory
  23. 2026-08-16 14:56 UTCEPSS rescore
  24. 2026-08-16 08:38 UTCEG score recompute
  25. 2026-08-16 08:38 UTCVendor advisory
Show 68 more
  1. 2026-08-16 02:14 UTCEPSS rescore
  2. 2026-08-15 07:52 UTCEG score recompute
  3. 2026-08-15 07:52 UTCVendor advisory
  4. 2026-08-15 01:30 UTCEPSS rescore
  5. 2026-08-14 06:11 UTCVendor advisory
  6. 2026-08-13 05:24 UTCEG score recompute
  7. 2026-08-12 13:51 UTCEPSS rescore
  8. 2026-08-12 04:38 UTCEG score recompute
  9. 2026-08-11 03:40 UTCEG score recompute
  10. 2026-08-11 00:00 UTCEPSS rescore
  11. 2026-08-10 02:54 UTCEG score recompute
  12. 2026-08-09 13:46 UTCEPSS rescore
  13. 2026-08-09 02:08 UTCEG score recompute
  14. 2026-08-08 16:37 UTCEPSS rescore
  15. 2026-08-08 01:22 UTCEG score recompute
  16. 2026-08-07 00:37 UTCEG score recompute
  17. 2026-08-06 13:47 UTCEPSS rescore
  18. 2026-08-05 23:50 UTCEG score recompute
  19. 2026-08-05 19:17 UTCEPSS rescore
  20. 2026-08-04 23:05 UTCEG score recompute
  21. 2026-08-04 15:10 UTCEPSS rescore
  22. 2026-08-04 10:39 UTCEPSS rescore
  23. 2026-08-03 22:18 UTCEG score recompute
  24. 2026-08-03 10:36 UTCEPSS rescore
  25. 2026-08-02 21:31 UTCEG score recompute
  26. 2026-08-02 02:27 UTCEPSS rescore
  27. 2026-08-01 20:45 UTCEG score recompute
  28. 2026-08-01 04:16 UTCEPSS rescore
  29. 2026-07-30 19:11 UTCEG score recompute
  30. 2026-07-30 16:28 UTCEPSS rescore
  31. 2026-07-30 01:30 UTCEPSS rescore
  32. 2026-07-28 17:17 UTCEG score recompute
  33. 2026-07-28 15:37 UTCEPSS rescore
  34. 2026-07-27 15:46 UTCEG score recompute
  35. 2026-07-26 14:54 UTCEPSS rescore
  36. 2026-07-26 12:47 UTCEG score recompute
  37. 2026-07-25 14:18 UTCEPSS rescore
  38. 2026-07-24 14:18 UTCEPSS rescore
  39. 2026-07-23 14:18 UTCEPSS rescore
  40. 2026-07-23 03:19 UTCEG score recompute
  41. 2026-07-22 14:08 UTCEPSS rescore
  42. 2026-07-21 15:25 UTCEPSS rescore
  43. 2026-07-20 17:08 UTCEPSS rescore
  44. 2026-07-19 14:31 UTCEPSS rescore
  45. 2026-07-19 14:31 UTCEPSS rescore
  46. 2026-07-19 02:29 UTCEPSS rescore
  47. 2026-07-18 10:04 UTCEPSS rescore
  48. 2026-07-16 17:03 UTCEPSS rescore
  49. 2026-07-15 16:57 UTCEPSS rescore
  50. 2026-07-15 16:57 UTCEPSS rescore
  51. 2026-07-15 02:00 UTCEPSS rescore
  52. 2026-07-15 02:00 UTCEPSS rescore
  53. 2026-07-13 22:31 UTCEPSS rescore
  54. 2026-07-13 06:13 UTCEPSS rescore
  55. 2026-07-13 06:13 UTCEPSS rescore
  56. 2026-07-12 05:46 UTCEPSS rescore
  57. 2026-07-11 08:27 UTCEPSS rescore
  58. 2026-07-11 08:27 UTCEPSS rescore
  59. 2026-07-09 23:11 UTCEG score recompute▼ 2.30
  60. 2026-07-09 19:10 UTCEPSS rescore
  61. 2026-07-09 19:10 UTCEPSS rescore
  62. 2026-07-09 13:52 UTCNVD updateCVSS v3 → 5.9 · severity → MEDIUM
  63. 2026-07-08 15:16 UTCEPSS rescore
  64. 2026-07-08 15:16 UTCEPSS rescore
  65. 2026-07-07 13:46 UTCEPSS rescore
  66. 2026-07-07 13:46 UTCEPSS rescore
  67. 2026-07-06 19:07 UTCEG score recompute
  68. 2026-07-06 19:06 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-54291?
CVE-2026-54291 is a medium vulnerability published on July 6, 2026. pgjdbc is an open source postgresql JDBC Driver. In releases 42.7.4 through 42.7.11, channelBinding=require connections can be silently downgraded from SCRAM-SHA-256-PLUS with channel binding to plain SCRAM-SHA-256 without it, losing the man-in-the-middle protection the setting is meant to…
When was CVE-2026-54291 disclosed?
CVE-2026-54291 was first published in the National Vulnerability Database on July 6, 2026, with the most recent update on July 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-54291 actively exploited?
CVE-2026-54291 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 85.6% of all scored CVEs.
What is the CVSS score of CVE-2026-54291?
CVE-2026-54291 has a CVSS v3 base score of 5.9 (NVD).
How do I remediate CVE-2026-54291?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-54291, 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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