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CVE-2026-47737

Puma is a Ruby/Rack web server built for parallelism. From 5.5.0 until 7.2.1 and 8.0.2, Puma is vulnerable to source IP spoofing when set_remote_address proxy_protocol: :v1 is enabled and persistent connections are used because Puma incorrectly re-parses PROXY protocol headers after each keep-alive request on the same connection, allowing an attacker to inject a second PROXY header and overwrite REMOTE_ADDR. This issue is fixed in versions 7.2.1 and 8.0.2.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:d33a78222fe24839a1a9a572118cbe75e8ac113f1d4aaeb5255affa159cbd765
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-345","description":"CWE-345: Insufficient Verification of Data Authenticity","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:8c6af63c51ed071097487a630eba477df2d0c056599c68905648b28f1442d476 · sha256:20e308b9d3b87031… · /containers/cna/problemTypes/1/descriptions/0

{"cweId":"CWE-290","description":"CWE-290: Authentication Bypass by Spoofing","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:8c6af63c51ed071097487a630eba477df2d0c056599c68905648b28f1442d476 · sha256:20e308b9d3b87031… · /containers/cna/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion
{"product":"puma","vendor":"puma","versions":[{"status":"affected","version":">= 5.5.0, < 7.2.1"},{"status":"affected","version":">= 8.0.0, < 8.0.2"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:8c6af63c51ed071097487a630eba477df2d0c056599c68905648b28f1442d476 · sha256:20e308b9d3b87031… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:8c6af63c51ed071097487a630eba477df2d0c056599c68905648b28f1442d476 · sha256:20e308b9d3b87031… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-345","description":"CWE-345: Insufficient Verification of Data Authenticity","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:8c6af63c51ed071097487a630eba477df2d0c056599c68905648b28f1442d476 · sha256:20e308b9d3b87031… · /containers/cna/problemTypes/1/descriptions/0
{"cweId":"CWE-290","description":"CWE-290: Authentication Bypass by Spoofing","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:8c6af63c51ed071097487a630eba477df2d0c056599c68905648b28f1442d476 · sha256:20e308b9d3b87031… · /containers/cna/problemTypes/0/descriptions/0

Source references

7 source assertions
{"name":"https://github.com/puma/puma/commit/439c6136d9c2275721b7864db3ee78af7c80889f","tags":["x_refsource_MISC"],"url":"https://github.com/puma/puma/commit/439c6136d9c2275721b7864db3ee78af7c80889f"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:8c6af63c51ed071097487a630eba477df2d0c056599c68905648b28f1442d476 · sha256:20e308b9d3b87031… · /containers/cna/references/3
{"name":"https://github.com/puma/puma/commit/ebe9db3929ab8299d19c8f5b41e8ef4f4b22fa58","tags":["x_refsource_MISC"],"url":"https://github.com/puma/puma/commit/ebe9db3929ab8299d19c8f5b41e8ef4f4b22fa58"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:8c6af63c51ed071097487a630eba477df2d0c056599c68905648b28f1442d476 · sha256:20e308b9d3b87031… · /containers/cna/references/4
{"name":"https://github.com/puma/puma/pull/3944","tags":["x_refsource_MISC"],"url":"https://github.com/puma/puma/pull/3944"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:8c6af63c51ed071097487a630eba477df2d0c056599c68905648b28f1442d476 · sha256:20e308b9d3b87031… · /containers/cna/references/1
{"name":"https://github.com/puma/puma/pull/3947","tags":["x_refsource_MISC"],"url":"https://github.com/puma/puma/pull/3947"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:8c6af63c51ed071097487a630eba477df2d0c056599c68905648b28f1442d476 · sha256:20e308b9d3b87031… · /containers/cna/references/2
{"name":"https://github.com/puma/puma/releases/tag/v7.2.1","tags":["x_refsource_MISC"],"url":"https://github.com/puma/puma/releases/tag/v7.2.1"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:8c6af63c51ed071097487a630eba477df2d0c056599c68905648b28f1442d476 · sha256:20e308b9d3b87031… · /containers/cna/references/5
{"name":"https://github.com/puma/puma/releases/tag/v8.0.2","tags":["x_refsource_MISC"],"url":"https://github.com/puma/puma/releases/tag/v8.0.2"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:8c6af63c51ed071097487a630eba477df2d0c056599c68905648b28f1442d476 · sha256:20e308b9d3b87031… · /containers/cna/references/6
{"name":"https://github.com/puma/puma/security/advisories/GHSA-2vqw-3mp8-cgmx","tags":["x_refsource_CONFIRM"],"url":"https://github.com/puma/puma/security/advisories/GHSA-2vqw-3mp8-cgmx"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:8c6af63c51ed071097487a630eba477df2d0c056599c68905648b28f1442d476 · sha256:20e308b9d3b87031… · /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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