Injection in Apple Async HTTP Client
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · High · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and GitHub.
Summary
Versions of Async HTTP Client prior to 1.13.2 are vulnerable to a form of targeted request manipulation called CRLF injection. This vulnerability was the result of insufficient validation of HTTP header field values before sending them to the network. Users are vulnerable if they pass untrusted data into HTTP header field values without prior sanitisation. Common use-cases here might be to place usernames from a database into HTTP header fields. This vulnerability allows attackers to inject new HTTP header fields, or entirely new requests, into the data stream. This can cause requests to be understood very differently by the remote server than was intended. In general, this is unlikely to result in data disclosure, but it can result in a number of logical errors and other misbehaviours.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Apple | Async HTTP Client | up to 1.13.1 | — | No fix listed | CNA |
| — | github.com/swift-server/async-http-client (SwiftURL) | 1.13.0 to before 1.13.2 | 1.13.2 | Patch available | GHSA-v3r5-pjpm-mwgq |
| — | github.com/swift-server/async-http-client (SwiftURL) | 1.10.0 to before 1.12.1 | 1.12.1 | Patch available | GHSA-v3r5-pjpm-mwgq |
| — | github.com/swift-server/async-http-client (SwiftURL) | 1.5.0 to before 1.9.1 | 1.9.1 | Patch available | GHSA-v3r5-pjpm-mwgq |
| — | github.com/swift-server/async-http-client (SwiftURL) | before 1.4.1 | 1.4.1 | Patch available | GHSA-v3r5-pjpm-mwgq |
- Async HTTP Client VendorApple Affected up to 1.13.1 Fixed in — No fix listed CNA
- github.com/swift-server/async-http-client (SwiftURL) Vendor— Affected 1.13.0 to before 1.13.2 Fixed in 1.13.2 Patch available GHSA-v3r5-pjpm-mwgq
- github.com/swift-server/async-http-client (SwiftURL) Vendor— Affected 1.10.0 to before 1.12.1 Fixed in 1.12.1 Patch available GHSA-v3r5-pjpm-mwgq
- github.com/swift-server/async-http-client (SwiftURL) Vendor— Affected 1.5.0 to before 1.9.1 Fixed in 1.9.1 Patch available GHSA-v3r5-pjpm-mwgq
- github.com/swift-server/async-http-client (SwiftURL) Vendor— Affected before 1.4.1 Fixed in 1.4.1 Patch available GHSA-v3r5-pjpm-mwgq
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:asynchttpclient_project:async-http-client:*:*:*:*:*:*:*:* | before 1.4.1; 1.5.0 to before 1.9.1; 1.10.0 to before 1.12.1; 1.13.0 to before 1.13.2 | Vulnerable | Asynchttpclient Project |
- cpe:2.3:a:asynchttpclient_project:async-http-client:*:*:*:*:*:*:*:* Versions before 1.4.1; 1.5.0 to before 1.9.1; 1.10.0 to before 1.12.1; 1.13.0 to before 1.13.2 Vulnerable ·Asynchttpclient Project
Remediation
- Fix · GHSA-v3r5-pjpm-mwgq github.com/swift-server/async-http-client (SwiftURL) Fixed in 1.13.2 Advisory →
- Fix · GHSA-v3r5-pjpm-mwgq github.com/swift-server/async-http-client (SwiftURL) Fixed in 1.12.1 Advisory →
- Fix · GHSA-v3r5-pjpm-mwgq github.com/swift-server/async-http-client (SwiftURL) Fixed in 1.9.1 Advisory →
- Fix · GHSA-v3r5-pjpm-mwgq github.com/swift-server/async-http-client (SwiftURL) Fixed in 1.4.1 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2023-0040
- 2026-10-03 Alias added: GHSA-v3r5-pjpm-mwgq
References
Advisory 2
Other 6
- https://github.com/swift-server/async-http-client/commit/7f05a8da46cc2a4ab43218722298b81ac7a08031
- https://github.com/swift-server/async-http-client
- https://github.com/swift-server/async-http-client/releases/tag/1.12.1
- https://github.com/swift-server/async-http-client/releases/tag/1.13.2
- https://github.com/swift-server/async-http-client/releases/tag/1.4.1
- https://github.com/swift-server/async-http-client/releases/tag/1.9.1
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- TI-2025-17951 Out-of-bounds write in Apple Safari KEVCVSS 3.1CRITICAL 10.0
- TI-2025-17847 Use after free in Apple iOS and iPadOS KEVCVSS 3.1CRITICAL 10.0
Sources
- CVE-2023-0040 · CVE Program
- CVE-2023-0040 · NVD
- FIRST EPSS
- GHSA-v3r5-pjpm-mwgq · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences