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CVE-2026-89407

CVE-2026-89407

waiting for further signalsZero needs more public information before it can validate it.

GHSA-p6pp-m3f8-5c89 ↗EUVD-2026-84498 ↗

no check availablenot proven exploitable
cve.orgpublic pocExploit code has been published by someone. Source signals can also carry a PoC (Proof of Concept).+9.0dkevAttacks confirmed in the real world.
maven:com.fasterxml.jackson.core:jackson-core >= 2.17.0, <= 2.18.10; >= 2.19.0, <= 2.21.6; >= 2.22.0, <= 2.22.2; >= 3.0.0, <= 3.1.6; >= 3.2.0, <= 3.2.1
fixed in 2.18.11, 2.21.7, 2.22.3, 3.1.7, 3.2.2
ETK-2026-269, permanent identifier
pkg:maven/com.fasterxml.jackson.core/jackson-core
pkg:maven/tools.jackson.core/jackson-core
cvss7.5cna vendorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
19d 13h 31msince last run
9mAI analysisAnalysis: how long the AI spent reversing this signal.
timeline
0 = trigger signal
trigger signal (cve.org) +0dpublic poc+9.0dwaiting for further signals+9.1d
0
+2d
+4d
+6d
+8d
+10d

description

jackson-core number validation can consume excessive CPU when processing certain long strings. An attacker may cause denial of service if they can submit JSON string values that the application coerces into numeric types.

mitigation

Upgrade com.fasterxml.jackson.core:jackson-core to 2.18.11, 2.21.7, or 2.22.3, or tools.jackson.core:jackson-core to 3.1.7 or 3.2.2. Until upgraded, restrict accepted string and request-body sizes and apply parsing time limits.

fixed in 2.18.11, 2.21.7, 2.22.3, 3.1.7, 3.2.2

check
no
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.
0.55%44th percentile
agent run time
9m
cve.org record, t = 0The moment cve.org publishes the CVE in full.
2026-09-22 14:53Z
Δ to public pocExploit code has been published by someone. Source signals can also carry a PoC (Proof of Concept).
+9.0d
Δ to kevAttacks confirmed in the real world.
–

outcome

Contextual: an exploit technique exists, 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. 2026-09-22 14:53Z
    ghsa: trigger signal, started the run
    https://github.com/advisories/GHSA-p6pp-m3f8-5c89
  2. 2026-09-22 14:53Z
    public poc, published 2026-10-01 15:19Z
    https://github.com/advisories/GHSA-p6pp-m3f8-5c89
  3. 2026-09-22 14:53Z

this entry in the feed

GET /api/v1/feed/CVE-2026-89407

{
  "etk_id": "ETK-2026-269",
  "cve_id": "CVE-2026-89407",
  "display_id": "CVE-2026-89407",
  "ghsa_id": "GHSA-p6pp-m3f8-5c89",
  "euvd_id": "EUVD-2026-84498",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Regex denial of service in jackson-core",
  "summary": "jackson-core number validation can consume excessive CPU when processing certain long strings. An attacker may cause denial of service if they can submit JSON string values that the application coerces into numeric types.",
  "mitigation": "Upgrade com.fasterxml.jackson.core:jackson-core to 2.18.11, 2.21.7, or 2.22.3, or tools.jackson.core:jackson-core to 3.1.7 or 3.2.2. Until upgraded, restrict accepted string and request-body sizes and apply parsing time limits.",
  "vendor": "maven",
  "product": "maven:com.fasterxml.jackson.core:jackson-core",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 2.17.0, <= 2.18.10"
      ],
      "ecosystem": "maven",
      "fixed_versions": [
        "2.18.11"
      ],
      "package_name": "com.fasterxml.jackson.core:jackson-core",
      "purl": "pkg:maven/com.fasterxml.jackson.core/jackson-core"
    },
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 2.19.0, <= 2.21.6"
      ],
      "ecosystem": "maven",
      "fixed_versions": [
        "2.21.7"
      ],
      "package_name": "com.fasterxml.jackson.core:jackson-core",
      "purl": "pkg:maven/com.fasterxml.jackson.core/jackson-core"
    },
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 2.22.0, <= 2.22.2"
      ],
      "ecosystem": "maven",
      "fixed_versions": [
        "2.22.3"
      ],
      "package_name": "com.fasterxml.jackson.core:jackson-core",
      "purl": "pkg:maven/com.fasterxml.jackson.core/jackson-core"
    },
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 3.0.0, <= 3.1.6"
      ],
      "ecosystem": "maven",
      "fixed_versions": [
        "3.1.7"
      ],
      "package_name": "tools.jackson.core:jackson-core",
      "purl": "pkg:maven/tools.jackson.core/jackson-core"
    },
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 3.2.0, <= 3.2.1"
      ],
      "ecosystem": "maven",
      "fixed_versions": [
        "3.2.2"
      ],
      "package_name": "tools.jackson.core:jackson-core",
      "purl": "pkg:maven/tools.jackson.core/jackson-core"
    }
  ],
  "cwes": null,
  "cvss_score": 7.5,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
  "epss_score": 0.0055,
  "epss_percentile": 0.447,
  "epss_asof": "2026-10-20",
  "automation": "contextual",
  "check": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": 8.691089333333334,
  "t0_at": "2026-09-22T14:53:20.999000+00:00",
  "signals": {
    "public_poc": {
      "at": "2026-10-01T15:19:21+00:00",
      "days": 9.018055567129629,
      "is_lower_bound": false,
      "measured_at": "2026-09-22T14:53:20.999000+00:00",
      "url": "https://github.com/advisories/GHSA-p6pp-m3f8-5c89"
    },
    "trigger_signal": {
      "at": "2026-09-22T14:53:20.999000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-09-22T14:53:20.999000+00:00",
      "url": "https://github.com/advisories/GHSA-p6pp-m3f8-5c89"
    }
  }
}

published 2026-10-01 18:17Z
last change 2026-10-21 05:31Z

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