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CVE-2026-45135

Caddy is an extensible server platform that uses TLS by default. From 2.7.0 until 2.11.3, the FastCGI transport's splitPos() in modules/caddyhttp/reverseproxy/fastcgi/fastcgi.go misuses golang.org/x/text/search with search.IgnoreCase when the request path contains a non-ASCII byte. Two distinct flaws in that fallback let an attacker mislead Caddy's FastCGI splitting into treating a non-.php (or other configured split_path extension) file as a script. In any deployment where the attacker can plac
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:cd3b19bb2b26b919c181b20152209520839ac6177ad81b6615e99d487feb06ea
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 3 assertions

{"cweId":"CWE-20","description":"CWE-20: Improper Input Validation","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:f1e45b5c58ff0a772727094b584d7e2262586be63abb0795d1d10849855afe90 · sha256:8c80e7ff6f943fac… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-176","description":"CWE-176: Improper Handling of Unicode Encoding","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:f1e45b5c58ff0a772727094b584d7e2262586be63abb0795d1d10849855afe90 · sha256:8c80e7ff6f943fac… · /containers/cna/problemTypes/1/descriptions/0

{"cweId":"CWE-178","description":"CWE-178: Improper Handling of Case Sensitivity","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:f1e45b5c58ff0a772727094b584d7e2262586be63abb0795d1d10849855afe90 · sha256:8c80e7ff6f943fac… · /containers/cna/problemTypes/2/descriptions/0

Affected products and versions

1 source assertion
{"product":"caddy","vendor":"caddyserver","versions":[{"status":"affected","version":">= 2.7.0, < 2.11.3"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:f1e45b5c58ff0a772727094b584d7e2262586be63abb0795d1d10849855afe90 · sha256:8c80e7ff6f943fac… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":8.1,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:f1e45b5c58ff0a772727094b584d7e2262586be63abb0795d1d10849855afe90 · sha256:8c80e7ff6f943fac… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

3 source assertions
{"cweId":"CWE-20","description":"CWE-20: Improper Input Validation","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:f1e45b5c58ff0a772727094b584d7e2262586be63abb0795d1d10849855afe90 · sha256:8c80e7ff6f943fac… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-176","description":"CWE-176: Improper Handling of Unicode Encoding","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:f1e45b5c58ff0a772727094b584d7e2262586be63abb0795d1d10849855afe90 · sha256:8c80e7ff6f943fac… · /containers/cna/problemTypes/1/descriptions/0
{"cweId":"CWE-178","description":"CWE-178: Improper Handling of Case Sensitivity","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:f1e45b5c58ff0a772727094b584d7e2262586be63abb0795d1d10849855afe90 · sha256:8c80e7ff6f943fac… · /containers/cna/problemTypes/2/descriptions/0

Source references

2 source assertions
{"tags":["exploit"],"url":"https://github.com/caddyserver/caddy/security/advisories/GHSA-m675-2p33-xv9g"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:f1e45b5c58ff0a772727094b584d7e2262586be63abb0795d1d10849855afe90 · sha256:8c80e7ff6f943fac… · /containers/adp/0/references/0
{"name":"https://github.com/caddyserver/caddy/security/advisories/GHSA-m675-2p33-xv9g","tags":["x_refsource_CONFIRM"],"url":"https://github.com/caddyserver/caddy/security/advisories/GHSA-m675-2p33-xv9g"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:f1e45b5c58ff0a772727094b584d7e2262586be63abb0795d1d10849855afe90 · sha256:8c80e7ff6f943fac… · /containers/cna/references/0

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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