Mojo::JSON versions before 9.47 for Perl allow memory exhaustion via unbounded recursion in the...
Summary
Vulnerability reported (CVE-2026-14803). Risk of unauthorized operations or information disclosure. Exploitable via _decode_value.
Original description
The description as published by the source.
Mojo::JSON versions before 9.47 for Perl allow memory exhaustion via unbounded recursion in the pure-Perl decoder.
The pure-Perl decode path (_decode_value dispatching to _decode_array and _decode_object) recurses with no depth limit, so a small deeply nested JSON document can consume excessive memory.
This path is the default when Cpanel::JSON::XS is not installed or MOJO_NO_JSON_XS=1 is set; the Cpanel::JSON::XS fast path is not affected.
Any caller that decodes an untrusted JSON body, for example Mojo::Message::json reached through $c->req->json, can exhaust process memory and cause denial of service.
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-2026-14803 has been found.
Attackers can target a specific entry point like _decode_value over the network to misuse the product.
Risk of unauthorized operations or information disclosure. CVSS score: 6.5/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "CVE-2026-14803" on the vendor's site.
CVE-2026-14803 — CWE-674 / CVSS v3 6.5
Attack vector: remote (network-reachable) / no user interaction
Attack surface: _decode_value / _decode_array / _decode_object
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-674) has been reported. Attackers reach the vulnerable code path via _decode_value.
Check the vendor advisory for the affected versions. Attack surface: _decode_value / _decode_array / _decode_object.
Severity: Medium (CVSS 6.5/10). Risk of unauthorized operations or information disclosure.
Update to the patched release per vendor advisory.
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影響コンポーネントを特定する。
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2Post-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。
Fix status by distribution
Fixed packages published by each distribution for this CVE
- Debian DEBIAN-CVE-2026-14803 libmojolicious-perl
- Ubuntu UBUNTU-CVE-2026-14803 libmojolicious-perl
References
- advisory metacpan.org
- advisory nvd.nist.gov
- advisory github.com
- package github.com
- patch github.com
- web github.com
- web openwall.com
- web cpan.org