CVE-2023-7078
Server-Side Request Forgery (SSRF) in Miniflare
Sending specially crafted HTTP requests to Miniflare's server could result in arbitrary HTTP and WebSocket requests being sent from the server. If Miniflare was configured to listen on external network interfaces (as was the default in wrangler until 3.19.0), an attacker on the local network could access other local servers.
Attack profile
How easy it is to exploit
- Attack vector
- Adjacent network
- Complexity
- High
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
Server-Side Request Forgery (SSRF) in Miniflare
Sending specially crafted HTTP requests to Miniflare's server could result in arbitrary HTTP and WebSocket requests being sent from the server. If Miniflare was configured to listen on external network interfaces (as was the default in wrangler until 3.19.0), an attacker on the local network could access other local servers.
- Record
CVE-2023-7078- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N - Weakness
- CWE-918
- Updated
- 2026-11-02
EUVDEUVD-2023-3202
Sending specially crafted HTTP requests to Miniflare's server could result in arbitrary HTTP and WebSocket requests being sent from the server. If Miniflare was configured to listen on external network interfaces (as was the default in wrangler until 3.19.0), an attacker on the local network could access other local servers.
- Record
EUVD-2023-3202- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-fwvg-2739-22v7
Miniflare vulnerable to Server-Side Request Forgery (SSRF)
Impact
Sending specially crafted HTTP requests to Miniflare's server could result in arbitrary HTTP and WebSocket requests being sent from the server. If Miniflare was configured to listen on external network interfaces (as was the default in wrangler until 3.19.0), an attacker on the local network could access other local servers.
Patches
The issue was fixed in [email protected].
Workarounds
Ensure Miniflare is configured to listen on just local interfaces. This is the default behaviour, but can also be configured with the host: "127.0.0.1" option.
References
- Record
GHSA-fwvg-2739-22v7- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N - Weakness
- CWE-918
- Updated
- 2026-11-02
NVD
Sending specially crafted HTTP requests to Miniflare's server could result in arbitrary HTTP and WebSocket requests being sent from the server. If Miniflare was configured to listen on external network interfaces (as was the default in wrangler until 3.19.0), an attacker on the local network could access other local servers.
- Record
CVE-2023-7078- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N - CVSS 3.1
- 8.1 High
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N - Weakness
- CWE-918
- Updated
- 2026-11-02
OSV
Server-Side Request Forgery (SSRF) in Miniflare
Sending specially crafted HTTP requests to Miniflare's server could result in arbitrary HTTP and WebSocket requests being sent from the server. If Miniflare was configured to listen on external network interfaces (as was the default in wrangler until 3.19.0), an attacker on the local network could access other local servers.
- Record
CVE-2023-7078- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N - Weakness
- CWE-918
- Updated
- 2026-11-02
OSVGHSA-fwvg-2739-22v7
Miniflare vulnerable to Server-Side Request Forgery (SSRF)
Impact
Sending specially crafted HTTP requests to Miniflare's server could result in arbitrary HTTP and WebSocket requests being sent from the server. If Miniflare was configured to listen on external network interfaces (as was the default in wrangler until 3.19.0), an attacker on the local network could access other local servers.
Patches
The issue was fixed in [email protected].
Workarounds
Ensure Miniflare is configured to listen on just local interfaces. This is the default behaviour, but can also be configured with the host: "127.0.0.1" option.
References
- Record
GHSA-fwvg-2739-22v7- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N - Weakness
- CWE-918
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
miniflarenpm |
3.20230821.0 up to 3.20231030.2 | 3.20231030.2 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases, published | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2023-7078 is a high vulnerability (CVSS 7.5) in Cloudflare Miniflare, published December 29, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.55%, the 46th percentile. Fixed in miniflare 3.20231030.2.
References
github.com/cloudflare/workers-sdk/security/advisories/GHSA-fwvg-2739-22v7
nvd.nist.gov/vuln/detail/CVE-2023-7078