LiveActive security incident?Get immediate response
CVE Record

CVE-2026-32141: flatted: Unbounded recursion DoS in parse() revive phase

flatted is a circular JSON parser. Prior to 3.4.0, flatted's parse() function uses a recursive revive() phase to resolve circular references in deserialized JSON. When given a crafted payload with deeply nested or self-referential $ indices, the recursion depth is unbounded, causing a stack overflow that crashes the Node.js process. This vulnerability is fixed in 3.4.0.

HighCVSS 7.5Not KEV-listedUpdated
Discuss exposureBack to CVEs
Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

CVE-2026-32141 is a denial-of-service flaw in the npm package flatted before 3.4.0. A crafted input can make a Node.js process crash during parsing. The main business risk is service outage where applications parse untrusted or externally influenced data with this library.

Executive priority

Prioritize remediation for internet-facing or high-availability Node.js services using flatted. This is not evidenced as data compromise, but unauthenticated service crashes can still create business disruption and incident response cost.

Technical view

flatted parse() recursively revives circular references. Before 3.4.0, that recursion was unbounded, so deeply nested or self-referential index structures could trigger stack overflow and terminate the Node.js process. CVSS is 7.5 with network attack vector and availability-only impact.

Likely exposure

Exposure is likely in Node.js applications or bundled products using WebReflection flatted versions below 3.4.0, especially where flatted.parse() handles untrusted input. Red Hat advisories indicate downstream product tracking, but exact local exposure requires dependency and package inventory.

Exploitation context

The source bundle does not show CISA KEV listing or confirmed active exploitation. The CVSS vector indicates remote, unauthenticated, low-complexity denial of service, but available evidence supports crash risk rather than data theft or code execution.

Researcher notes

The core issue is CWE-674 and CWE-770: recursive processing without bounded depth or resource control. The cited fix is version 3.4.0. Do not assume exploit-in-the-wild status from severity alone; the bundle marks KEV as false.

Mitigation direction

  • Upgrade flatted to version 3.4.0 or later.
  • Update transitive parent packages that pin vulnerable flatted versions.
  • Apply applicable Red Hat RHSA updates for vendor-packaged copies.
  • Avoid sending untrusted data into flatted.parse() until fixed.
  • Use vendor guidance where package-specific remediation differs.

Validation and detection

  • Inventory npm lockfiles, SBOMs, and deployed images for flatted below 3.4.0.
  • Identify code paths where flatted.parse() handles external or user-controlled data.
  • Confirm production artifacts include flatted 3.4.0 or later after remediation.
  • Review Red Hat advisories for affected downstream products in use.
  • Monitor process crash telemetry for parsing-related availability incidents.
Prepared
Confidence
high
Sources
12

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

cwe · low confidence lookup

CWE-674: Exact CWE lookup

Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.

Open ATT&CK lookup
cwe · low confidence lookup

CWE-770: Exact CWE lookup

Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.

Open ATT&CK lookup
cve · low confidence lookup

CVE-2026-32141 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

Open ATT&CK lookup
Vulnerability profileCVE Program record
Severity
High
CVSS
7.5 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

2CVSS vectors
5Timeline events
2ADP providers
13Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: pocAutomatable: yesTechnical Impact: partial

CVSS vector scores

2 official scores

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
7.5CVSS 3.1HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H3.93.6GitHub_M
7.5CVSS 3.1HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H3.93.6redhat-SADP

Vulnerability scoring details

Base CVSS 3.1 score

7.5High
CVSS 3.1 vector shape for CVE-2026-32141Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. ADP timelineredhat-SADP

    Made public.

  3. CVE publishedCVE Program

    The CVE record was published.

  4. ADP timelineredhat-SADP

    Reported to Red Hat.

  5. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CISA-ADPCISA ADP Vulnrichment
other:ssvc
redhat-SADPflatted: flatted: Unbounded recursion DoS in parse() revive phase
other:Red Hat severity ratingcvssV3_1
  • 2026-03-12T19:01:30.987Z: Reported to Red Hat.
  • 2026-03-12T18:08:09.634Z: Made public.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
WebReflectionflatted< 3.4.0Listed
Weakness

CWE details

CWE-674CWE-770

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.

CWE-674 · source CWE mapping

Uncontrolled Recursion

Uncontrolled Recursion represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.

Open CWE intelligenceSame-CWE CVEs
CWE-770 · source CWE mapping

Allocation of Resources Without Limits or Throttling

Allocation of Resources Without Limits or Throttling represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.

Open CWE intelligenceSame-CWE CVEs