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CVE-2026-30851

Caddy is an extensible server platform that uses TLS by default. From version 2.10.0 to before version 2.11.2, forward_auth copy_headers does not strip client-supplied headers, allowing identity injection and privilege escalation. This issue has been patched in version 2.11.2.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:bc54a9080f43d28b11969e96d00d60109d363d9851427d6ca99bc70e2f6c7af6
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"cweId":"CWE-287","description":"CWE-287: Improper Authentication","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:cd899da8e14ce2ff1afabae42e3372f9e27f6b85a1627c8479159fde5aae7a31 · sha256:f0c16b3a09bb66c8… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-345","description":"CWE-345: Insufficient Verification of Data Authenticity","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:cd899da8e14ce2ff1afabae42e3372f9e27f6b85a1627c8479159fde5aae7a31 · sha256:f0c16b3a09bb66c8… · /containers/cna/problemTypes/1/descriptions/0

Affected products and versions

1 source assertion
{"product":"caddy","vendor":"caddyserver","versions":[{"status":"affected","version":">= 2.10.0, < 2.11.2"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:cd899da8e14ce2ff1afabae42e3372f9e27f6b85a1627c8479159fde5aae7a31 · sha256:f0c16b3a09bb66c8… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":8.1,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:cd899da8e14ce2ff1afabae42e3372f9e27f6b85a1627c8479159fde5aae7a31 · sha256:f0c16b3a09bb66c8… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-287","description":"CWE-287: Improper Authentication","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:cd899da8e14ce2ff1afabae42e3372f9e27f6b85a1627c8479159fde5aae7a31 · sha256:f0c16b3a09bb66c8… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-345","description":"CWE-345: Insufficient Verification of Data Authenticity","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:cd899da8e14ce2ff1afabae42e3372f9e27f6b85a1627c8479159fde5aae7a31 · sha256:f0c16b3a09bb66c8… · /containers/cna/problemTypes/1/descriptions/0

Source references

4 source assertions
{"name":"https://github.com/caddyserver/caddy/issues/6610","tags":["x_refsource_MISC"],"url":"https://github.com/caddyserver/caddy/issues/6610"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:cd899da8e14ce2ff1afabae42e3372f9e27f6b85a1627c8479159fde5aae7a31 · sha256:f0c16b3a09bb66c8… · /containers/cna/references/1
{"name":"https://github.com/caddyserver/caddy/pull/6608","tags":["x_refsource_MISC"],"url":"https://github.com/caddyserver/caddy/pull/6608"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:cd899da8e14ce2ff1afabae42e3372f9e27f6b85a1627c8479159fde5aae7a31 · sha256:f0c16b3a09bb66c8… · /containers/cna/references/2
{"name":"https://github.com/caddyserver/caddy/pull/7545","tags":["x_refsource_MISC"],"url":"https://github.com/caddyserver/caddy/pull/7545"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:cd899da8e14ce2ff1afabae42e3372f9e27f6b85a1627c8479159fde5aae7a31 · sha256:f0c16b3a09bb66c8… · /containers/cna/references/3
{"name":"https://github.com/caddyserver/caddy/security/advisories/GHSA-7r4p-vjf4-gxv4","tags":["x_refsource_CONFIRM"],"url":"https://github.com/caddyserver/caddy/security/advisories/GHSA-7r4p-vjf4-gxv4"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:cd899da8e14ce2ff1afabae42e3372f9e27f6b85a1627c8479159fde5aae7a31 · sha256:f0c16b3a09bb66c8… · /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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