Vulnerability in com.fasterxml.jackson.core:jackson-databind (CVE-2026-50193)
Summary
Vulnerability in com.fasterxml.jackson.core:jackson-databind (CVE-2026-50193). Risk of unauthorized operations or information disclosure. Exploitable via JsonNode. Mitigation: upgrade to 2.14.0 or later.
Original description
The description as published by the source.
Impact
Potential Denial-of-Service when attacker sends deeply nested JSON if (and only if) service:
- Reads deeply nested (1000s of levels) JSON as
JsonNode(ObjectMapper.readTree()) - Writes out same (or modifided) node using
JsonNode.toString()
which can consume significant amount of resources with concurrent relatively small requests (1000 nested arrays is 2kB).
Patches
Fixed in 2.14.0 via https://github.com/FasterXML/jackson-databind/issues/3447.
Workarounds
Avoid serializing JsonNode using toString(): use ObjectMapper.writeValueAsString(node)
Source: GitHub Security Advisories (Global) 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-2026-50193 has been found in com.fasterxml.jackson.core:jackson-databind.
Attackers can target a specific entry point like JsonNode over the network to misuse the product.
Risk of unauthorized operations or information disclosure. CVSS score: 7.5/10.
What to do: upgrade com.fasterxml.jackson.core:jackson-databind to 2.14.0 or later.
If unsure, ask your IT team or search "com.fasterxml.jackson.core:jackson-databind CVE-2026-50193" on the vendor's site.
CVE-2026-50193 (com.fasterxml.jackson.core:jackson-databind) — CWE-400 / CVSS v3 7.5
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Attack surface: JsonNode
Patched: 2.14.0 — apply immediately
Workaround: Avoid serializing JsonNode using toString(): use ObjectMapper.writeValueAsString(node)
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.
A vulnerability (CWE-400) exists in com.fasterxml.jackson.core:jackson-databind. Attackers reach the vulnerable code path via JsonNode without authentication.
Check the vendor advisory for the affected versions of com.fasterxml.jackson.core:jackson-databind. Attack surface: JsonNode.
Severity: High (CVSS 7.5/10). Risk of unauthorized operations or information disclosure.
Update to 2.14.0.
Workaround: Avoid serializing JsonNode using toString(): use ObjectMapper.writeValueAsString(node)
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
-
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。
-
2Apply temporary workaround mitigate
Avoid serializing `JsonNode` using `toString()`: use ObjectMapper.writeValueAsString(node)パッチが適用されるまでの応急処置として、Avoid serializing
JsonNodeusingtoString(): use ObjectMapper.writeValueAsString(node) を実施。回避策の副作用 (機能低下) を確認した上で。 -
3Apply patch patch
Upgrade com.fasterxml.jackson.core:jackson-databind to 2.14.0ステージング環境で 2.14.0 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。
-
4Post-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
- Debian DEBIAN-CVE-2026-50193 jackson-databind Fixed in: 2.14.0-1
- Ubuntu UBUNTU-CVE-2026-50193 jackson-databind
References
- web github.com
- web github.com
- web github.com
- web github.com
- web nvd.nist.gov