Security readout for executives and security teams
Plain-English summary
Older Vapor web applications can be crashed by a specially crafted URL-encoded form request when automatic content decoding is used. The impact is availability only: a remote unauthenticated attacker can cause process failure, but the provided sources do not indicate data theft or code execution. Vapor fixed the issue in 4.61.1.
Executive priority
Prioritize remediation for public Vapor services because the issue can remotely crash applications without authentication. It is not a confidentiality breach based on the provided sources, but outages can affect customer-facing availability and operational reliability.
Technical view
CVE-2022-31019 is unbounded attacker-controlled stack growth in Vapor's URLEncodedFormDecoder. Deeply nested form data can trigger stack overflow and crash the server process during automatic content decoding. The CVSS 3.1 score is 7.5, reflecting network reachability, low complexity, no privileges, no user interaction, and high availability impact.
Likely exposure
Exposure is most likely in Swift services using Vapor versions before 4.61.1 that accept URL-encoded form bodies and rely on automatic content decoding. Internet-facing endpoints increase business risk because exploitation requires no authentication according to the CVSS vector.
Exploitation context
The public advisory describes a crafted request body that can crash affected servers. The source bundle does not show CISA KEV listing or other evidence of active exploitation in the wild. Treat this as publicly documented and remotely reachable, but not confirmed exploited from the provided evidence.
Researcher notes
The root issue is recursive or unbounded parsing behavior in URLEncodedFormDecoder that permits stack exhaustion from attacker-controlled nesting depth. The fix reference should be reviewed for exact guard behavior. Avoid assuming broader Vapor components or non-form parsers are affected without source evidence.
Mitigation direction
- Upgrade Vapor to version 4.61.1 or later.
- Prioritize internet-facing Vapor applications that parse URL-encoded form bodies.
- Review vendor advisory and commit before applying compensating controls.
- Monitor affected services for unexplained process crashes or availability degradation.
Validation and detection
- Inventory Swift services and confirm their Vapor dependency versions.
- Identify routes using automatic content decoding for form submissions.
- Confirm deployed builds use Vapor 4.61.1 or later.
- Review service logs for repeated crashes tied to form POST handling.
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
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-120: Exact CWE lookup
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Open ATT&CK lookupCVE-2022-31019 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/vapor/vapor/security/advisories/GHSA-qvxg-wjxc-r4ggCVE reference · x_refsource_CONFIRM
- https://github.com/vapor/vapor/commit/6c63226a4ab82ce53730eb1afb9ca63866fcf033CVE 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.
Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.