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CVE-2026-65636

Improper Neutralization of CRLF Sequences vulnerability in ufirstgroup ymlr (Elixir.Ymlr module) allows attackers to inject arbitrary content into generated YAML documents through document comments. Ymlr.document!/2 interpolates each caller-supplied comment string into the output behind a single # prefix without validating it or escaping line breaks. Because a YAML comment is terminated by a line break, the first carriage return or line feed in the comment string ends the comment context and eve
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:7000115fc9a9f94dea7a977bead2fa3114e3fcda6847b8e0e3eae5006f96bdcd
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 2 assertions

{"collectionURL":"https://github.com","cpes":["cpe:2.3:a:ufirstgroup:ymlr:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["Elixir.Ymlr"],"packageName":"ufirstgroup/ymlr","packageURL":"pkg:github/ufirstgroup/ymlr","product":"ymlr","programFiles":["lib/ymlr.ex"],"programRoutines":[{"name":"'Elixir.Ymlr':document!/2"},{"name":"'Elixir.Ymlr':documents!/2"}],"repo":"https://github.com/ufirstgroup/ymlr","vendor":"ufirstgroup","versions":[{"lessThan":"42a0bf8b2af44b0e7c42d0b7044c8588ca5866dc","status":"affected","version":"0c11a86de83825e91c27cecaccb03f36416d8fe0","versionType":"git"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:584c859b60b4a268b5c50e3839597132c955f7340d5fd834a0afad0757c50bd3 · sha256:41c4834b721a836a… · /containers/cna/affected/1

{"collectionURL":"https://repo.hex.pm","cpes":["cpe:2.3:a:ufirstgroup:ymlr:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["Elixir.Ymlr"],"packageName":"ymlr","packageURL":"pkg:hex/ymlr","product":"ymlr","programFiles":["lib/ymlr.ex"],"programRoutines":[{"name":"'Elixir.Ymlr':document!/2"},{"name":"'Elixir.Ymlr':documents!/2"}],"repo":"https://github.com/ufirstgroup/ymlr","vendor":"ufirstgroup","versions":[{"lessThan":"5.1.6","status":"affected","version":"0.0.1","versionType":"semver"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:584c859b60b4a268b5c50e3839597132c955f7340d5fd834a0afad0757c50bd3 · sha256:41c4834b721a836a… · /containers/cna/affected/0

Affected products and versions

2 source assertions
{"collectionURL":"https://github.com","cpes":["cpe:2.3:a:ufirstgroup:ymlr:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["Elixir.Ymlr"],"packageName":"ufirstgroup/ymlr","packageURL":"pkg:github/ufirstgroup/ymlr","product":"ymlr","programFiles":["lib/ymlr.ex"],"programRoutines":[{"name":"'Elixir.Ymlr':document!/2"},{"name":"'Elixir.Ymlr':documents!/2"}],"repo":"https://github.com/ufirstgroup/ymlr","vendor":"ufirstgroup","versions":[{"lessThan":"42a0bf8b2af44b0e7c42d0b7044c8588ca5866dc","status":"affected","version":"0c11a86de83825e91c27cecaccb03f36416d8fe0","versionType":"git"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:584c859b60b4a268b5c50e3839597132c955f7340d5fd834a0afad0757c50bd3 · sha256:41c4834b721a836a… · /containers/cna/affected/1
{"collectionURL":"https://repo.hex.pm","cpes":["cpe:2.3:a:ufirstgroup:ymlr:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["Elixir.Ymlr"],"packageName":"ymlr","packageURL":"pkg:hex/ymlr","product":"ymlr","programFiles":["lib/ymlr.ex"],"programRoutines":[{"name":"'Elixir.Ymlr':document!/2"},{"name":"'Elixir.Ymlr':documents!/2"}],"repo":"https://github.com/ufirstgroup/ymlr","vendor":"ufirstgroup","versions":[{"lessThan":"5.1.6","status":"affected","version":"0.0.1","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:584c859b60b4a268b5c50e3839597132c955f7340d5fd834a0afad0757c50bd3 · sha256:41c4834b721a836a… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"LOCAL","baseScore":2.1,"baseSeverity":"LOW","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"LOW","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"LOW"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:584c859b60b4a268b5c50e3839597132c955f7340d5fd834a0afad0757c50bd3 · sha256:41c4834b721a836a… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-93","description":"CWE-93 Improper Neutralization of CRLF Sequences ('CRLF Injection')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:584c859b60b4a268b5c50e3839597132c955f7340d5fd834a0afad0757c50bd3 · sha256:41c4834b721a836a… · /containers/cna/problemTypes/0/descriptions/0

Source references

5 source assertions
{"tags":["related"],"url":"https://cna.erlef.org/cves/CVE-2026-65636.html"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:584c859b60b4a268b5c50e3839597132c955f7340d5fd834a0afad0757c50bd3 · sha256:41c4834b721a836a… · /containers/cna/references/1
{"tags":["patch"],"url":"https://github.com/ufirstgroup/ymlr/commit/42a0bf8b2af44b0e7c42d0b7044c8588ca5866dc"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:584c859b60b4a268b5c50e3839597132c955f7340d5fd834a0afad0757c50bd3 · sha256:41c4834b721a836a… · /containers/cna/references/4
{"tags":["patch"],"url":"https://github.com/ufirstgroup/ymlr/commit/7e53061fb2809b787fba0373c46b78e253c83adc"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:584c859b60b4a268b5c50e3839597132c955f7340d5fd834a0afad0757c50bd3 · sha256:41c4834b721a836a… · /containers/cna/references/3
{"tags":["vendor-advisory","related"],"url":"https://github.com/ufirstgroup/ymlr/security/advisories/GHSA-p8qx-7cp9-v6c9"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:584c859b60b4a268b5c50e3839597132c955f7340d5fd834a0afad0757c50bd3 · sha256:41c4834b721a836a… · /containers/cna/references/0
{"tags":["related"],"url":"https://osv.dev/vulnerability/EEF-CVE-2026-65636"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:584c859b60b4a268b5c50e3839597132c955f7340d5fd834a0afad0757c50bd3 · sha256:41c4834b721a836a… · /containers/cna/references/2

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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