CVE-2026-54512

HIGHPre-NVD 8.18.1—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.1 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.9%, top 43% 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
8.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1.0%CVSS: 8.1Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

jackson-databind contains the general-purpose data-binding functionality and tree-model for Jackson Data Processor. From 2.10.0 until 2.18.8, 2.21.4, and 3.1.4, jackson-databind's PolymorphicTypeValidator (PTV) is the primary safety mechanism guarding polymorphic deserialization. When polymorphic typing is enabled and a type identifier contains generic parameters (i.e. the type ID string contains <), DatabindContext._resolveAndValidateGeneric() validates only the raw container class name (the substring before <) against the configured PTV. If the container type is approved, the method parses the full canonical type string via TypeFactory.constructFromCanonical() and returns the fully parameterized type without ever validating the nested type arguments against the PTV. The nested type arguments are then resolved, instantiated, and populated as beans during deserialization. An attacker who controls the type ID can therefore place a denied class as a generic type parameter of an allowed container — for example java.util.ArrayList when only java.util.ArrayList is allow-listed. The container passes the PTV check; com.evil.Gadget is loaded via Class.forName(name, true, loader), instantiated, and its properties are set from attacker-controlled JSON. This completely bypasses an explicitly configured PTV allow-list. This vulnerability is fixed in 2.18.8, 2.21.4, and 3.1.4.

CVSS v3
8.1
EG Score
8.1HIGHmedium confidence
EG Risk
41
EG Risk 41/100

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
Severity81% × 45%
Exploitation1% × 40%
Automatability30% × 15%
EPSS PROB
1.0%
EPSS %ILE
61st
KEV
Not listed

Published

June 23, 2026

Last Modified

June 27, 2026

Advisory Details (3)

Auto-updated Jun 24, 2026
🔬 Proof of concept available. Patch available. Sources: github_commit, github.
githubMentions a patch (unverified)🟡 PoC Available

PolymorphicTypeValidator bypass via generic type parameters in jackson-databind allows arbitrary class instantiation · Advisory · FasterXML/jackson-databind · GitHub

https://github.com/FasterXML/jackson-databind/security/advisories/GHSA-j3rv-43j4-c7qm
generic

`PolymorphicTypeValidator` needs to validate generic type parameters too [CVE-2026-54512] by cowtowncoder · Pull Request #5988 · FasterXML/jackson-databind · GitHub

https://github.com/FasterXML/jackson-databind/issues/5988
github_commit

commit 434d6c511de7 (FasterXML/jackson-databind)

Fix landed in FasterXML/jackson-databind commit 434d6c511de7 — awaiting tagged release

https://github.com/FasterXML/jackson-databind/commit/434d6c511de7fdd9872f29157aafb6162d12d8d5

Vendor Advisories for CVE-2026-54512(20)

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

Patch Availability(24)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhateap8-xml-security-0:3.0.6-1.redhat_00001.1.el10eap2026-09-22redhat
redhateap8-xml-security-0:3.0.6-1.redhat_00001.1.el9eap2026-09-22redhat
redhateap8-xml-security-0:3.0.6-1.redhat_00001.1.el8eap2026-09-22redhat
redhatjackson-databind2026-09-21redhat
redhatrhaiis/vllm-cuda-rhel9:17895827762026-09-17redhat
redhatrhoai/odh-vllm-gaudi-rhel9:17867124642026-09-08redhat
redhatopenvox-server-0:8.15.2-1.el9sat2026-09-03redhat
redhatpython3.12-pulpcore-0:3.73.30-3.el9pc2026-09-03redhat
redhatdevspaces/pluginregistry-rhel9:17877597232026-09-01redhat
redhatrhaiis/vllm-cuda-rhel9:17878605802026-08-31redhat
redhatocp-tools-4/jenkins-rhel9:17871246352026-08-26redhat
redhatocp-tools-4/jenkins-rhel9:17871250692026-08-26redhat
redhatocp-tools-4/jenkins-rhel9:17871253112026-08-26redhat
redhatocp-tools-4/jenkins-rhel8:17865335652026-08-26redhat
redhatocp-tools-4/jenkins-rhel9:17871247792026-08-26redhat
redhatocp-tools-4/jenkins-rhel9:17871249252026-08-26redhat
redhatocp-tools-4/jenkins-rhel9:17871246322026-08-26redhat
redhatocp-tools-4/jenkins-rhel8:17865335612026-08-26redhat
redhatocp-tools-4/jenkins-rhel8:17866286812026-08-26redhat
redhatocp-tools-4/jenkins-rhel8:17866286672026-08-26redhat
redhatocp-tools-4/jenkins-rhel9:17871251662026-08-26redhat
redhatrh-lightspeed-runtimes/runtimes-agent-init-rhel9:17863787222026-08-12redhat
redhateap7-wildfly-0:7.4.25-2.GA_redhat_00001.1.el9eap2026-08-11redhat
redhatjboss-eap-7/eap74-els-openjdk8-openshift-rhel82026-08-11redhat

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

(6 across 5 ecosystems)
Maven(2)
PackageVulnerable rangeFix by version rangeDependents
com.fasterxml.jackson.core:jackson-databind2.19.0 ... 2.21.3 (13 versions)
  • 2.10.0 up to 2.18.8: fixed in 2.18.8
  • 3.0.0 up to 3.1.4: fixed in 3.1.4
  • 2.19.0 up to 2.21.4: fixed in 2.21.4
—
tools.jackson.core:jackson-databind3.0.0 ... 3.1.3 (10 versions)
  • 3.0.0 up to 3.1.4: fixed in 3.1.4
—
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
jackson-databind2.12.1-1 ... 2.14.0-1 (10 versions)
  • every version on: no fix on record
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
jackson-databind2.14.0+ds-1, 2.14.0+ds-2, 2.14.0-1, 2.14.0-1+deb12u1
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
jackson-databind2.14.0+ds-1, 2.14.0+ds-1+deb13u1, 2.14.0+ds-2
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
jackson-databind2.14.0+ds-1, 2.14.0+ds-2
  • every version on: no fix on record
—

Weakness Classification(2)

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

All Vendor Advisories

(25)

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 7× in last 7d / 32× 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 214 total refreshes for this CVE.

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

Related CVEs(same product + same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-54512?
CVE-2026-54512 is a high vulnerability published on June 23, 2026. jackson-databind contains the general-purpose data-binding functionality and tree-model for Jackson Data Processor. From 2.10.0 until 2.18.8, 2.21.4, and 3.1.4, jackson-databind's PolymorphicTypeValidator (PTV) is the primary safety mechanism guarding polymorphic deserialization. When polymorphic…
When was CVE-2026-54512 disclosed?
CVE-2026-54512 was first published on June 23, 2026, with the most recent update on June 27, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-54512 actively exploited?
CVE-2026-54512 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.0% probability of exploitation in the next 30 days (61st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-54512?
CVE-2026-54512 has a CVSS base score of 8.1 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-54512?
A fix for CVE-2026-54512 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-54512 are linked in the Vendor Advisories panel on this page.

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