# hackney (Hex) vulnerabilities

17 known vulnerabilities (1 critical, 6 high, 7 medium, 3 low), with the versions each affects and the releases that fix them.

## At a glance

- Latest release: not known (cve.now hasn't read this package's releases)
- Newest unaffected release: not known without release data
- Registry: https://hex.pm/packages/hackney

## Advisories (17)

### [CVE-2026-97200](https://cve.now/CVE-2026-97200): Unbounded response body buffering and decompression in hackney

- Severity: High 8.2
- Published: Oct 26, 2026
- Affected: from 2.0.0-beta.1, fixed in 4.9.0.

### [CVE-2026-115693](https://cve.now/CVE-2026-115693): Custom cacerts or cacertfile do not restrict trust to the pinned CA in hackney

- Severity: Critical 9.1
- Published: Oct 26, 2026
- Affected: from 1.24.0, fixed in 4.9.0.

### [CVE-2026-113440](https://cve.now/CVE-2026-113440): HTTP/1.1 and HTTP/2 redirects resend basic\_auth and cookie to a different scheme or port in hackney

- Severity: Medium 6.0
- Published: Oct 26, 2026
- Affected: from 2.0.0, fixed in 4.9.0.

### [CVE-2026-115700](https://cve.now/CVE-2026-115700): SSRF allowlist bypass via percent-encoded bracketed IPv6 or trailing-dot IP literal in hackney

- Severity: Medium 6.9
- Published: Oct 26, 2026
- Affected: from 4.0.1, fixed in 4.9.0.

### [CVE-2026-112880](https://cve.now/CVE-2026-112880): CRLF injection in Proxy-Authorization header built from proxy\_auth\_fun in hackney

- Severity: Low 2.1
- Published: Oct 26, 2026
- Affected: from 2.0.0, fixed in 4.9.0.

### [CVE-2026-47073](https://cve.now/CVE-2026-47073): Unbounded memory consumption in WebSocket client in hackney

- Severity: High 8.7
- Published: May 25, 2026
- Affected: from 2.0.0, fixed in 4.0.1; from 2.0.0, fixed in 4.0.1.

### [CVE-2026-47067](https://cve.now/CVE-2026-47067): Atom table exhaustion via unrecognized URL schemes in hackney

- Severity: High 8.7
- Published: May 25, 2026
- Affected: from 2.0.0, fixed in 4.0.1; from 2.0.0, fixed in 4.0.1.

### [CVE-2026-47072](https://cve.now/CVE-2026-47072): CRLF injection in WebSocket upgrade request in hackney

- Severity: Medium 6.9
- Published: May 25, 2026
- Affected: from 2.0.0, fixed in 4.0.1; from 2.0.0, fixed in 4.0.1.

### [CVE-2026-47076](https://cve.now/CVE-2026-47076): SSRF allowlist bypass via percent-encoded host in hackney

- Severity: Medium 6.9
- Published: May 25, 2026
- Affected: from 0.13.0, fixed in 4.0.1; from 0.13.0, fixed in 4.0.1.

### [CVE-2026-47070](https://cve.now/CVE-2026-47070): HTTP/3 redirect handler leaks Authorization and Cookie headers to cross-origin redirect target in hackney

- Severity: Medium 6.0
- Published: May 25, 2026
- Affected: from 3.1.1, fixed in 4.0.1; from 3.1.1, fixed in 4.0.1.

### [CVE-2026-47075](https://cve.now/CVE-2026-47075): CR/LF injection in query parameter in hackney

- Severity: Medium 6.8
- Published: May 25, 2026
- Affected: from 0.13.1, fixed in 4.0.1; from 0.13.1, fixed in 4.0.1; fixed in 4.0.1.

### [CVE-2026-47077](https://cve.now/CVE-2026-47077): Unbounded body accumulation in HTTP/3 response loop in hackney

- Severity: High 8.2
- Published: May 25, 2026
- Affected: from 2.0.0, fixed in 4.0.1; from 2.0.0, fixed in 4.0.1.

### [CVE-2026-47071](https://cve.now/CVE-2026-47071): SOCKS5 TLS upgrade ignores caller timeout in hackney

- Severity: High 8.2
- Published: May 25, 2026
- Affected: from 0.10.0, fixed in 4.0.1; from 0.10.0, fixed in 4.0.1.

### [CVE-2026-47066](https://cve.now/CVE-2026-47066): Infinite loop in Alt-Svc header parser in hackney

- Severity: High 8.7
- Published: May 25, 2026
- Affected: from 2.0.0-beta.1, fixed in 4.0.1; from 2.0.0-beta.1, fixed in 4.0.1; from 2.0.0, fixed in 4.0.1.

### [CVE-2026-47069](https://cve.now/CVE-2026-47069): CRLF injection in cookie domain/path options in hackney

- Severity: Low 2.1
- Published: May 25, 2026
- Affected: from 0.9.0, fixed in 4.0.1; from 0.9.0, fixed in 4.0.1.

### [CVE-2025-3864](https://cve.now/CVE-2025-3864): Connection pool exhaustion in hackney

- Severity: Low 2.3
- Published: May 28, 2025
- Affected: fixed in 1.24.0.

### [CVE-2025-1211](https://cve.now/CVE-2025-1211): Versions of the package hackney before 1.21.0 are vulnerable to Server-side Request Forgery (SSRF) due to improper parsing of URLs by URI…

- Severity: Medium 6.3
- Published: Feb 11, 2025
- Affected: fixed in 1.21.0.

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