Baitaphish
Security intelligence
SearchLatest briefing
CVE Explorer

CVE-2026-43969

Improper Neutralization of CRLF Sequences ('CRLF Injection') vulnerability in ninenines cowlib allows HTTP request splitting and cookie smuggling via unvalidated cookie name and value fields. cow_cookie:cookie/1 in cowlib builds a client-side Cookie: request header from a list of name-value pairs without validating either field. An attacker who controls the cookie names or values passed to this function can inject ;, ,, CR, LF, or TAB characters into the serialized header. This enables two clas
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:7caceea6a12a76b122b12078ecb11241b89a00d1e9da8e1c4320ebda2dfc572f
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://repo.hex.pm","cpes":["cpe:2.3:a:ninenines:cowlib:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["cow_cookie"],"packageName":"cowlib","packageURL":"pkg:hex/cowlib","product":"cowlib","programFiles":["src/cow_cookie.erl"],"programRoutines":[{"name":"cow_cookie:cookie/1"}],"repo":"https://github.com/ninenines/cowlib","vendor":"ninenines","versions":[{"status":"affected","version":"2.9.0","versionType":"semver"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:8b831c25282bce1b03a1c0d4dfc4ceb5557fdc21bbce6f65d190662cf4ec5ba2 · sha256:823743be05c97c5d… · /containers/cna/affected/0

{"collectionURL":"https://github.com","cpes":["cpe:2.3:a:ninenines:cowlib:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["cow_cookie"],"packageName":"ninenines/cowlib","packageURL":"pkg:github/ninenines/cowlib","product":"cowlib","programFiles":["src/cow_cookie.erl"],"programRoutines":[{"name":"cow_cookie:cookie/1"}],"repo":"https://github.com/ninenines/cowlib","vendor":"ninenines","versions":[{"status":"affected","version":"f017f8a0ecbffd5033d9ab49bf180186f7a523a7","versionType":"git"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:8b831c25282bce1b03a1c0d4dfc4ceb5557fdc21bbce6f65d190662cf4ec5ba2 · sha256:823743be05c97c5d… · /containers/cna/affected/1

Affected products and versions

2 source assertions
{"collectionURL":"https://repo.hex.pm","cpes":["cpe:2.3:a:ninenines:cowlib:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["cow_cookie"],"packageName":"cowlib","packageURL":"pkg:hex/cowlib","product":"cowlib","programFiles":["src/cow_cookie.erl"],"programRoutines":[{"name":"cow_cookie:cookie/1"}],"repo":"https://github.com/ninenines/cowlib","vendor":"ninenines","versions":[{"status":"affected","version":"2.9.0","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:8b831c25282bce1b03a1c0d4dfc4ceb5557fdc21bbce6f65d190662cf4ec5ba2 · sha256:823743be05c97c5d… · /containers/cna/affected/0
{"collectionURL":"https://github.com","cpes":["cpe:2.3:a:ninenines:cowlib:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["cow_cookie"],"packageName":"ninenines/cowlib","packageURL":"pkg:github/ninenines/cowlib","product":"cowlib","programFiles":["src/cow_cookie.erl"],"programRoutines":[{"name":"cow_cookie:cookie/1"}],"repo":"https://github.com/ninenines/cowlib","vendor":"ninenines","versions":[{"status":"affected","version":"f017f8a0ecbffd5033d9ab49bf180186f7a523a7","versionType":"git"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:8b831c25282bce1b03a1c0d4dfc4ceb5557fdc21bbce6f65d190662cf4ec5ba2 · sha256:823743be05c97c5d… · /containers/cna/affected/1

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:v2:8b831c25282bce1b03a1c0d4dfc4ceb5557fdc21bbce6f65d190662cf4ec5ba2 · sha256:823743be05c97c5d… · /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:v2:8b831c25282bce1b03a1c0d4dfc4ceb5557fdc21bbce6f65d190662cf4ec5ba2 · sha256:823743be05c97c5d… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"tags":["related","third-party-advisory"],"url":"https://cna.erlef.org/cves/CVE-2026-43969.html"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:8b831c25282bce1b03a1c0d4dfc4ceb5557fdc21bbce6f65d190662cf4ec5ba2 · sha256:823743be05c97c5d… · /containers/cna/references/0
{"tags":["patch"],"url":"https://github.com/erlef/cowlib/commit/177953dd51540da11090666c1f007214127a1144"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:8b831c25282bce1b03a1c0d4dfc4ceb5557fdc21bbce6f65d190662cf4ec5ba2 · sha256:823743be05c97c5d… · /containers/cna/references/2
{"tags":["related"],"url":"https://osv.dev/vulnerability/EEF-CVE-2026-43969"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:8b831c25282bce1b03a1c0d4dfc4ceb5557fdc21bbce6f65d190662cf4ec5ba2 · sha256:823743be05c97c5d… · /containers/cna/references/1

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.

← Back to CVE Explorer