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CVE-2026-11437

A flaw has been found in perfree go-fastdfs-web up to 1.3.7. Affected is the function checkServer of the file /install/checkServer of the component Installation Endpoint. Executing a manipulation can lead to server-side request forgery. The attack can be executed remotely. The exploit has been published and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:b3bc30ffea0383567c1f49a6e17207da239513d7b8f89447a47bc83b15b345b2
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cvss · 4 assertions

{"metric":{"baseScore":6.9,"baseSeverity":"MEDIUM","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P","version":"4.0"},"metric_type":"cvssV4_0"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:27fb0461ea4f1a6c3ec241df64521fde14e20c60787861a09283043097772146 · sha256:da4291cc31846bce… · /containers/cna/metrics/0/cvssV4_0

{"metric":{"baseScore":7.3,"baseSeverity":"HIGH","vectorString":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R","version":"3.0"},"metric_type":"cvssV3_0"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:27fb0461ea4f1a6c3ec241df64521fde14e20c60787861a09283043097772146 · sha256:da4291cc31846bce… · /containers/cna/metrics/2/cvssV3_0

{"metric":{"baseScore":7.5,"vectorString":"AV:N/AC:L/Au:N/C:P/I:P/A:P/E:POC/RL:ND/RC:UR","version":"2.0"},"metric_type":"cvssV2_0"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:27fb0461ea4f1a6c3ec241df64521fde14e20c60787861a09283043097772146 · sha256:da4291cc31846bce… · /containers/cna/metrics/3/cvssV2_0

{"metric":{"baseScore":7.3,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R","version":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:27fb0461ea4f1a6c3ec241df64521fde14e20c60787861a09283043097772146 · sha256:da4291cc31846bce… · /containers/cna/metrics/1/cvssV3_1

Affected products and versions

1 source assertion
{"cpes":["cpe:2.3:a:perfree:go-fastdfs-web:*:*:*:*:*:*:*:*"],"modules":["Installation Endpoint"],"product":"go-fastdfs-web","vendor":"perfree","versions":[{"status":"affected","version":"1.3.0"},{"status":"affected","version":"1.3.1"},{"status":"affected","version":"1.3.2"},{"status":"affected","version":"1.3.3"},{"status":"affected","version":"1.3.4"},{"status":"affected","version":"1.3.5"},{"status":"affected","version":"1.3.6"},{"status":"affected","version":"1.3.7"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:27fb0461ea4f1a6c3ec241df64521fde14e20c60787861a09283043097772146 · sha256:da4291cc31846bce… · /containers/cna/affected/0

Provider-owned CVSS observations

4 source assertions
{"metric":{"baseScore":6.9,"baseSeverity":"MEDIUM","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P","version":"4.0"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:27fb0461ea4f1a6c3ec241df64521fde14e20c60787861a09283043097772146 · sha256:da4291cc31846bce… · /containers/cna/metrics/0/cvssV4_0
{"metric":{"baseScore":7.3,"baseSeverity":"HIGH","vectorString":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R","version":"3.0"},"metric_type":"cvssV3_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:27fb0461ea4f1a6c3ec241df64521fde14e20c60787861a09283043097772146 · sha256:da4291cc31846bce… · /containers/cna/metrics/2/cvssV3_0
{"metric":{"baseScore":7.5,"vectorString":"AV:N/AC:L/Au:N/C:P/I:P/A:P/E:POC/RL:ND/RC:UR","version":"2.0"},"metric_type":"cvssV2_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:27fb0461ea4f1a6c3ec241df64521fde14e20c60787861a09283043097772146 · sha256:da4291cc31846bce… · /containers/cna/metrics/3/cvssV2_0
{"metric":{"baseScore":7.3,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:27fb0461ea4f1a6c3ec241df64521fde14e20c60787861a09283043097772146 · sha256:da4291cc31846bce… · /containers/cna/metrics/1/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-918","description":"Server-Side Request Forgery","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:27fb0461ea4f1a6c3ec241df64521fde14e20c60787861a09283043097772146 · sha256:da4291cc31846bce… · /containers/cna/problemTypes/0/descriptions/0

Source references

5 source assertions
{"name":"CVE-2026-11437 | CVE Analysis and Report","tags":["third-party-advisory"],"url":"https://vuldb.com/cve/CVE-2026-11437"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:27fb0461ea4f1a6c3ec241df64521fde14e20c60787861a09283043097772146 · sha256:da4291cc31846bce… · /containers/cna/references/2
{"name":"Submit #822726 | perfree go-fastdfs-web ≤1.3.7 Server-Side Request Forgery","tags":["third-party-advisory"],"url":"https://vuldb.com/submit/822726"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:27fb0461ea4f1a6c3ec241df64521fde14e20c60787861a09283043097772146 · sha256:da4291cc31846bce… · /containers/cna/references/3
{"name":"VDB-369017 | perfree go-fastdfs-web Installation Endpoint checkServer server-side request forgery","tags":["vdb-entry","technical-description"],"url":"https://vuldb.com/vuln/369017"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:27fb0461ea4f1a6c3ec241df64521fde14e20c60787861a09283043097772146 · sha256:da4291cc31846bce… · /containers/cna/references/0
{"name":"VDB-369017 | CTI Indicators (IOB, IOC, IOA)","tags":["signature","permissions-required"],"url":"https://vuldb.com/vuln/369017/cti"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:27fb0461ea4f1a6c3ec241df64521fde14e20c60787861a09283043097772146 · sha256:da4291cc31846bce… · /containers/cna/references/1
{"tags":["exploit"],"url":"https://www.notion.so/Server-Side-Request-Forgery-SSRF-in-go-fastdfs-web-Installation-Endpoint-35aea92a3c41806485ffeeac7e18126a"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:27fb0461ea4f1a6c3ec241df64521fde14e20c60787861a09283043097772146 · sha256:da4291cc31846bce… · /containers/cna/references/4

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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