Authorization Flaw in com.fasterxml.jackson.core:jackson-databind (CVE-2026-54517)
Summary
Vulnerability in com.fasterxml.jackson.core:jackson-databind (CVE-2026-54517). Risk of unauthorized operations or information disclosure. Exploitable via true. Mitigation: upgrade to 3.1.4 or later.
Original description
The description as published by the source.
Summary
In BeanDeserializer._deserializeUsingPropertyBased, the active-view (@JsonView) filter was applied only to creator properties; the regular property-buffering branch performed no prop.visibleInView(activeView) check. A change making SetterlessProperty.isMerging() return true routed setterless Collection/Map properties through this unguarded path, so a setterless collection annotated with a restricted @JsonView is populated from attacker JSON even when the active view excludes it.
Impact
View-restricted (e.g. admin-only) setterless collection/map properties can be written from untrusted JSON despite @JsonView gating — an access-control / mass-assignment bypass. No RCE or DoS.
Affected / Patched (verified via git tag --contains)
- 2.21 line:
>= 2.21.0, < 2.21.4-> fixed in 2.21.4 (backport94c5d21, #5970) - 3.x line:
>= 3.0.0, < 3.1.4-> fixed in 3.1.4 (#5969,5bf23ed)
Severity / CWE
Maintainer: minor. Reporter: HIGH. CWE-863 (Incorrect Authorization); related CWE-1220.
Credits
Omkhar Arasaratnam (@omkhar) - finder.
Source: NIST National Vulnerability Database NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-54517 has been found in com.fasterxml.jackson.core:jackson-databind.
Attackers can target a specific entry point like true over the network to misuse the product.
Risk of unauthorized operations or information disclosure. CVSS score: 5.3/10.
What to do: upgrade com.fasterxml.jackson.core:jackson-databind to 3.1.4 or later.
If unsure, ask your IT team or search "com.fasterxml.jackson.core:jackson-databind CVE-2026-54517" on the vendor's site.
CVE-2026-54517 (com.fasterxml.jackson.core:jackson-databind) — CWE-863 / CVSS v3 5.3
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Attack surface: true
Patched: 3.1.4 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
Incorrect authorization (CWE-863) exists in com.fasterxml.jackson.core:jackson-databind. Attackers reach the vulnerable code path via true without authentication.
Check the vendor advisory for the affected versions of com.fasterxml.jackson.core:jackson-databind. Attack surface: true.
Severity: Medium (CVSS 5.3/10). Risk of unauthorized operations or information disclosure.
Update to 3.1.4.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Audit SBOM/dependencies to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
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1Identify exposure identify
Audit SBOM/dependencies for affected components.資産台帳・SBOM・依存マニフェストで com.fasterxml.jackson.core:jackson-databind を使っているサービスとバージョンを洗い出す。
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2Apply patch patch
Upgrade com.fasterxml.jackson.core:jackson-databind to 3.1.4ステージング環境で 3.1.4 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。
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3Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Affected packages
Fix status by distribution
Fixed packages published by each distribution for this CVE
- Ubuntu UBUNTU-CVE-2026-54517 jackson-databind
References
- web github.com
- web github.com
- web github.com
- web github.com
- web github.com
- web github.com
- web nvd.nist.gov