Security readout for executives and security teams
Plain-English summary
Orval versions before 8.21.0 can turn a malicious OpenAPI or Swagger property name into executable JavaScript inside generated MSW mocks. The code runs when the mock factory is invoked, potentially compromising developer machines, CI pipelines, tests, or applications that execute those mocks.
Executive priority
Treat this as an urgent software-supply-chain remediation for teams using Orval-generated MSW mocks. Prioritize environments where external specifications enter automated generation and CI has secrets or deployment access. Systems not generating or executing MSW mocks have materially lower exposure based on the supplied evidence.
Technical view
Orval’s MSW generator placed schema property names inside single-quoted object keys without safe encoding. An attacker able to influence an input specification could inject JavaScript into generated output. Execution is deferred until a generated mock factory or associated MSW handler runs. Version 8.21.0 fixes the encoding flaw.
Likely exposure
Exposure requires Orval earlier than 8.21.0, MSW mock generation, attacker-influenced schema content, and execution of the generated mock. Risk is greatest where specifications come from external, shared, or insufficiently trusted sources and generated mocks run with CI or developer privileges.
Exploitation context
The supplied sources do not establish active exploitation, and the CVE is not identified as KEV. Exploitation nevertheless has low stated complexity and requires no privileges or user interaction under the supplied CVSS assessment. Practical compromise depends on controlling schema input and triggering the generated mock.
Researcher notes
The vulnerable path is identified as getKey in packages/core/src/getters/keys.ts and downstream MSW generation. The issue is computed-property-key injection leading to JavaScript evaluation, although the record also lists CWE-89 and CWE-95. Evidence supplied does not quantify affected deployments or confirm exploitation in the wild.
Mitigation direction
- Upgrade Orval to version 8.21.0 or later.
- Regenerate MSW mocks after upgrading; existing generated files may retain unsafe output.
- Restrict schema inputs to trusted, reviewed sources until remediation is complete.
- Review CI and test credentials accessible when generated mocks execute.
Validation and detection
- Confirm installed and locked Orval versions across repositories and CI environments.
- Identify projects using Orval’s MSW mock generator.
- Determine whether schema property names can originate from untrusted or externally managed specifications.
- Regenerate mocks with the fixed version and review resulting repository changes.
- Investigate prior runs involving unexpected schema changes or generated JavaScript.
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-89: Database access and collection lookup
Injection into data stores can inform collection, data access, and exfiltration detection reviews. 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 lookupCWE-95: Code execution behavior lookup
Code execution and unsafe deserialization weaknesses often justify reviewing execution behavior and process telemetry. 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 lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2026-71867 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Critical
- CVSS
- 9.3 (4.0)
- Known Exploited
- No
- Published
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
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.
SSVC decision data
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:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N——GitHub_MVulnerability scoring details
Base CVSS 4.0 score
9.3CriticalVector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/orval-labs/orval/security/advisories/GHSA-2w86-xfrc-g85rCVE reference, GitHub_M · x_refsource_CONFIRM
- https://github.com/orval-labs/orval/pull/3692CVE reference, GitHub_M · x_refsource_MISC
- https://github.com/orval-labs/orval/commit/8ef1bfdf3f9bcaf9dabfbe2e42887f1c0e159ab6CVE reference, GitHub_M · x_refsource_MISC
- https://github.com/orval-labs/orval/releases/tag/v8.21.0CVE reference, GitHub_M · 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.