CVE-2026-73564
- Source
- https://cve.org/CVERecord?id=CVE-2026-73564
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-73564.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2026-73564
- Aliases
- Downstream
- Related
- Published
- 2026-08-13T17:35:46Z
- Modified
- 2026-10-26T02:31:45Z
- Severity
-
- 8.7 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CVSS Calculator
- Summary
- frp: Unauthenticated Remote Denial of Service in the frp SSH Tunnel Gateway via Integer Overflow
- Details
-
frp is a fast reverse proxy. From 0.53.0 until 0.70.1, frp's optional SSH Tunnel Gateway in pkg/ssh/server.go parses an SSH exec channel request by adding 4 to an attacker-controlled four-byte big-endian length. A length of 0xFFFFFFFF makes the uint32 addition wrap to 3, defeats the payload bounds check, and causes payload[4:3] to panic in TunnelServer.handleNewChannel. When no authorized-keys file is configured, sshConfig.NoClientAuth permits an unauthenticated peer to reach this channel phase before the frp token is checked, so a single five-byte request terminates the frps process and drops every active tunnel. This issue is fixed in version 0.70.1.
- Database specific
{ "cna_assigner": "GitHub_M", "cwe_ids": [ "CWE-129", "CWE-190" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/73xxx/CVE-2026-73564.json" }- References
-
- https://github.com/fatedier/frp/releases/tag/v0.70.1
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/73xxx/CVE-2026-73564.json
- https://github.com/fatedier/frp/security/advisories/GHSA-26gq-p25f-99cp
- https://nvd.nist.gov/vuln/detail/CVE-2026-73564
- https://github.com/fatedier/frp/commit/7dc7be930e2452ae93fd32f2a77f8c6fcd0b652b
- https://github.com/fatedier/frp/pull/5428
Affected packages
Git / github.com/fatedier/frp
Affected ranges
- Type
- GIT
- Repo
- https://github.com/fatedier/frp
- Events
- Database specific
-
Show details
{ "extracted_events": [ { "range": [ { "introduced": "0.53.0" }, { "fixed": "0.70.1" } ], "source": "AFFECTED_FIELD", "strategy": "StringRangeExpression" }, { "range": [ { "fixed": "7dc7be930e2452ae93fd32f2a77f8c6fcd0b652b" } ], "source": "REFERENCES_COMMIT" }, { "original_tag": "v0.70.1", "range": [ { "fixed": "fa3bcca2b0c4753cd4f0e2ab189dd6a5a6a15708" } ], "source": "REFERENCES_TAG" } ] }