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CVE-2026-110879

CVE-2026-110879

validatedZero produced an exploit or a check.

GHSA-m8xf-2cr7-77ph ↗

check availableZero validated a working check for it.not proven exploitableZero has a detection check, but hasn't produced a full working exploit yet.
awaiting cvepublic pocExploit code has been published by someone. Source signals can also carry a PoC (Proof of Concept).kevAttacks confirmed in the real world.
maven:com.fasterxml.jackson.core:jackson-databind >= 2.10.0, <= 2.18.11; >= 3.0.0, <= 3.1.7; >= 2.19.0, <= 2.21.7; >= 2.22.0, <= 2.22.3; >= 3.2.0, <= 3.2.3
fixed in 2.18.12, 3.1.8, 2.21.8, 2.22.4, 3.2.4
CWE-502 Deserialization of Untrusted Data
ETK-2026-2318Zero's internal tracking ID, independent of the CVE number., permanent identifier
pkg:maven/com.fasterxml.jackson.core/jackson-databind
pkg:maven/tools.jackson.core/jackson-databind
cvss9.8cna vendorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
−1h53mTTV
9mAI analysisAnalysis: how long the AI spent reversing this signal.
Check if you are vulnerable
timeline
0 = cve.org, not yet published
trigger signal −16h01mcheck available−1h53magent stopped
−15h
−12h
−9h
−6h
−3h
0

description

Jackson Databind versions using class-name polymorphic deserialization can accept unapproved classes in generic arguments or array element types. An unauthenticated attacker who can submit JSON to a reachable affected deserialization path may cause attacker-selected classes to be instantiated, with impact dependent on the application's polymorphism settings and classpath.

mitigation

Upgrade com.fasterxml.jackson.core:jackson-databind to 2.18.12, 2.21.8, or 2.22.4, or tools.jackson.core:jackson-databind to 3.1.8 or 3.2.4. Until upgraded, disable class-name polymorphism for untrusted data and restrict subtype rules to narrowly approved types.

fixed in 2.18.12, 3.1.8, 2.21.8, 2.22.4, 3.2.4

check
available
exploit
no
automationDeterministic: a check that runs on its own, the same request on every target. Contextual: an agentic technique that needs to be applied per target, for bugs that depend on contextual flows.
contextual
auth requiredWhether an attacker needs an account first, based on the CVSS vector's Privileges Required.
no
EPSSEstimate of the chance this CVE is exploited in the next 30 days. Refreshed daily.
–
agent run time
9m
cve.org record, t = 0The moment cve.org publishes the CVE in full.
not published yet
Δ to public pocExploit code has been published by someone. Source signals can also carry a PoC (Proof of Concept).
–
Δ to kevAttacks confirmed in the real world.
–

outcome

Contextual check: a technique exists and was validated, but no deterministic check could cover this one.

source signals

Public signals that triggered or updated the pipeline. These are inputs for the deltas above.

  1. 2026-10-20 22:44Z

this entry in the feed

GET /api/v1/feed/CVE-2026-110879

{
  "etk_id": "ETK-2026-2318",
  "cve_id": "CVE-2026-110879",
  "display_id": "CVE-2026-110879",
  "ghsa_id": "GHSA-m8xf-2cr7-77ph",
  "euvd_id": null,
  "status": "published",
  "anchor_state": "awaiting_cve",
  "title": "Generic type validation bypass in jackson-databind",
  "summary": "Jackson Databind versions using class-name polymorphic deserialization can accept unapproved classes in generic arguments or array element types. An unauthenticated attacker who can submit JSON to a reachable affected deserialization path may cause attacker-selected classes to be instantiated, with impact dependent on the application's polymorphism settings and classpath.",
  "mitigation": "Upgrade com.fasterxml.jackson.core:jackson-databind to 2.18.12, 2.21.8, or 2.22.4, or tools.jackson.core:jackson-databind to 3.1.8 or 3.2.4. Until upgraded, disable class-name polymorphism for untrusted data and restrict subtype rules to narrowly approved types.",
  "vendor": "maven",
  "product": "maven:com.fasterxml.jackson.core:jackson-databind",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 2.10.0, <= 2.18.11"
      ],
      "ecosystem": "maven",
      "fixed_versions": [
        "2.18.12"
      ],
      "package_name": "com.fasterxml.jackson.core:jackson-databind",
      "purl": "pkg:maven/com.fasterxml.jackson.core/jackson-databind"
    },
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 3.0.0, <= 3.1.7"
      ],
      "ecosystem": "maven",
      "fixed_versions": [
        "3.1.8"
      ],
      "package_name": "tools.jackson.core:jackson-databind",
      "purl": "pkg:maven/tools.jackson.core/jackson-databind"
    },
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 2.19.0, <= 2.21.7"
      ],
      "ecosystem": "maven",
      "fixed_versions": [
        "2.21.8"
      ],
      "package_name": "com.fasterxml.jackson.core:jackson-databind",
      "purl": "pkg:maven/com.fasterxml.jackson.core/jackson-databind"
    },
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 2.22.0, <= 2.22.3"
      ],
      "ecosystem": "maven",
      "fixed_versions": [
        "2.22.4"
      ],
      "package_name": "com.fasterxml.jackson.core:jackson-databind",
      "purl": "pkg:maven/com.fasterxml.jackson.core/jackson-databind"
    },
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 3.2.0, <= 3.2.3"
      ],
      "ecosystem": "maven",
      "fixed_versions": [
        "3.2.4"
      ],
      "package_name": "tools.jackson.core:jackson-databind",
      "purl": "pkg:maven/tools.jackson.core/jackson-databind"
    }
  ],
  "cwes": [
    502
  ],
  "cvss_score": 9.8,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
  "epss_score": null,
  "epss_percentile": null,
  "epss_asof": null,
  "automation": "contextual",
  "check": true,
  "check_confidence_basis": "assessed",
  "exploit": false,
  "pipeline_minutes": 9.145679833333332,
  "t0_at": null,
  "signals": {
    "check": {
      "at": "2026-10-21T12:52:49.466278+00:00",
      "days": -0.07844425501157408,
      "is_lower_bound": true,
      "measured_at": "2026-10-21T14:45:47.102092+00:00",
      "url": null
    },
    "trigger_signal": {
      "at": "2026-10-20T22:44:36+00:00",
      "days": -0.667489003599537,
      "is_lower_bound": true,
      "measured_at": "2026-10-21T14:45:47.102092+00:00",
      "url": "https://github.com/FasterXML/jackson-databind/security/advisories/GHSA-m8xf-2cr7-77ph"
    }
  }
}

published 2026-10-21 12:43Z
last change 2026-10-21 14:43Z

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