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

Applications using flatted before version 3.4.0 may crash when parsing maliciously structured input. An unauthenticated remote attacker could cause service disruption if attacker-controlled data reaches flatted.parse(). The issue affects availability; the supplied CVSS assessment indicates no confidentiality or integrity impact.

Executive priority

Prioritize internet-facing or multi-tenant services where untrusted data reaches flatted.parse(), because one request may terminate a Node.js process. Expedite upgrading those services and confirm deployed artifacts contain 3.4.0 or later. Lower priority is reasonable only after documenting that the vulnerable parser is unreachable from untrusted input.

Technical view

During parse() reference revival, affected flatted versions recursively resolve deeply nested or self-referential $ indices without a safe depth bound. Crafted serialized input can exhaust the JavaScript call stack and terminate the Node.js process. The issue is classified as CWE-674 and CWE-770 and is fixed in flatted 3.4.0.

Likely exposure

Highest exposure exists in network-facing Node.js services that pass untrusted request, message, file, or stored content to flatted.parse(). Risk may also arise through a transitive dependency. Installation alone does not prove exploitability; confirm the affected function is reachable from attacker-controlled data.

Exploitation context

The supplied CVSS 3.1 score is 7.5, reflecting remotely triggerable, low-complexity, unauthenticated denial of service without user interaction. The source bundle marks KEV false and provides no evidence of active exploitation. Repeated triggering could cause recurring outages where process supervision automatically restarts the service.

Researcher notes

Reachability is the key qualifier: determine whether the vulnerable revive phase processes adversary-controlled serialized data. Review direct and transitive dependency resolution, bundled output, and container contents. The supplied material establishes a crash condition and upstream fix, but does not establish exploitation in the wild or impact beyond availability.

Mitigation direction

  • Upgrade flatted to version 3.4.0 or later.
  • Update lockfiles and rebuild deployed artifacts to remove affected versions.
  • Restrict untrusted input from reaching flatted.parse() until upgrades are deployed.
  • Apply relevant Red Hat advisories where flatted is supplied through affected Red Hat products.

Validation and detection

  • Inventory direct and transitive flatted versions across source, lockfiles, images, and deployed artifacts.
  • Trace whether attacker-controlled data can reach flatted.parse().
  • Confirm production resolves flatted 3.4.0 or later after rebuilding.
  • Run isolated regression tests confirming malformed input cannot terminate the service.
  • Monitor process crashes and stack-overflow errors for attempted or accidental triggering.
Prepared
Confidence
high
Sources
5

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
15Source 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