An issue was discovered in Bloop Airmail 3 3.5.9 for macOS.
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 3.0 · NVD. Fix status from CNA.
Summary
An issue was discovered in Bloop Airmail 3 3.5.9 for macOS. Its primary WebView instance implements "webView:decidePolicyForNavigationAction:request:frame:decisionListener:" such that OpenURL is the default URL handler. A navigation request is processed by the default URL handler only if the currentEvent is NX_LMOUSEUP or NX_OMOUSEUP. An attacker may abuse HTML elements with an EventHandler for a chance to validate navigation requests for URLs that are processed during the NX_LMOUSEUP event triggered by clicking an email.
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2018-15670
- 2026-10-03 Alias added: GHSA-cqgx-5gh9-5jwx
References
More Bloop Airmail vulnerabilities
- TI-2017-12945 The OpenPGP specification allows a Cipher Feedback Mode (CFB) malleability-gadget attack… CVSS 3.0MEDIUM 5.9
- TI-2017-12946 The S/MIME specification allows a Cipher Block Chaining (CBC) malleability-gadget attack… CVSS 3.0MEDIUM 5.9
Sources
- CVE-2018-15670 · CVE Program
- CVE-2018-15670 · NVD
- FIRST EPSS
- GHSA-cqgx-5gh9-5jwx · GitHub Advisory Database · CC BY 4.0
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