Security readout for executives and security teams
Plain-English summary
CVE-2021-39131 is a denial-of-service issue in the Node.js package ced. If an application passes a non-Buffer value to ced v0.1.0, the Node.js process can crash. The business risk is service interruption where ced handles untrusted or poorly validated input.
Executive priority
Prioritize remediation for internet-facing or high-availability Node.js services that use ced. The issue is not known to be actively exploited from the provided sources, but the fix is straightforward and the impact is service availability.
Technical view
ced uses Google’s compact_enc_det library for character encoding detection. Versions before 1.0.0 mishandle unexpected input types: values other than Buffer can crash the Node.js process. The vendor advisory names v1.0.0 as patched and recommends Buffer.isBuffer validation as a workaround.
Likely exposure
Exposure is likely limited to Node.js applications that depend on sonicdoe/ced before 1.0.0 and pass user-controlled or variable data into ced without type validation. Systems not using ced, or only passing confirmed Buffer objects, are less likely exposed.
Exploitation context
The source bundle does not show CISA KEV listing or active exploitation evidence. The CVSS vector indicates remote, unauthenticated availability impact is possible when vulnerable application paths accept attacker-influenced data and pass it to ced.
Researcher notes
The evidence is clear on affected package, version boundary, crash condition, and workaround. Public sources in the bundle do not provide exploit-in-the-wild evidence, affected downstream products, or broader ecosystem impact, so exposure must be confirmed per application dependency and data flow.
Mitigation direction
- Upgrade ced to version 1.0.0 or later.
- Validate inputs with Buffer.isBuffer before calling ced.
- Reject or safely handle non-Buffer values before encoding detection.
- Review vendor advisory and release notes for deployment-specific guidance.
Validation and detection
- Review dependency manifests for ced versions below 1.0.0.
- Confirm transitive dependencies do not pin vulnerable ced versions.
- Audit ced call sites for missing Buffer type checks.
- Run regression tests covering non-Buffer input handling in safe test environments.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
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ATT&CK lookup starting points
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CWE-241: Exact CWE lookup
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Open ATT&CK lookupCVE-2021-39131 mapping review
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Open ATT&CK lookup- 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
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.
CVSS vector scores
1 official scoreWe 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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H3.93.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.5HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/sonicdoe/ced/security/advisories/GHSA-27wq-qx3q-fxm9CVE reference · x_refsource_CONFIRM
- https://github.com/sonicdoe/ced/commit/a4d9f10b6bf1cd468d1a5b9a283cdf437f8bb7b3CVE reference · x_refsource_MISC
- https://github.com/sonicdoe/ced/releases/tag/v1.0.0CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Handling of Unexpected Data Type
Improper Handling of Unexpected Data Type represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.