CVE Explorer

CVE-2026-43968

Improper Neutralization of CRLF Sequences ('CRLF Injection') vulnerability in ninenines cowlib allows SSE event splitting and injection via unvalidated field values. cow_sse:event/1 in cowlib guards the id and event fields against \n but not against bare \r, and the internal prefix_lines/2 function used for data and comment fields splits only on \n. Because the SSE specification requires decoders to treat \r\n, \r, and \n as equivalent line terminators, an attacker who controls any of these fie

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:090074682be78bd3a81659e20580acc031cbfdf2ec7d81dc2fe5e51797a10cb9

Known exploited

Not asserted

Disputed

Stale source

Conflicts

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_sse"],"packageName":"cowlib","packageURL":"pkg:hex/cowlib","product":"cowlib","programFiles":["src/cow_sse.erl"],"programRoutines":[{"name":"cow_sse:event/1"},{"name":"cow_sse:event_id/1"},{"name":"cow_sse:event_name/1"},{"name":"cow_sse:event_data/1"},{"name":"cow_sse:event_comment/1"},{"name":"cow_sse:prefix_lines/2"}],"repo":"https://github.com/ninenines/cowlib","vendor":"ninenines","versions":[{"lessThan":"2.16.1","status":"affected","version":"2.6.0","v…

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:5ec51089f1baba8d1a329af80dffe23c5c60514f2b2694fe41d81f0ebdaa0751 · sha256:b487b1d88658aefb… · /containers/cna/affected/0

{"collectionURL":"https://github.com","cpes":["cpe:2.3:a:ninenines:cowlib:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["cow_sse"],"packageName":"ninenines/cowlib","packageURL":"pkg:github/ninenines/cowlib","product":"cowlib","programFiles":["src/cow_sse.erl"],"programRoutines":[{"name":"cow_sse:event/1"},{"name":"cow_sse:event_id/1"},{"name":"cow_sse:event_name/1"},{"name":"cow_sse:event_data/1"},{"name":"cow_sse:event_comment/1"},{"name":"cow_sse:prefix_lines/2"}],"repo":"https://github.com/ninenines/cowlib","vendor":"ninenines","versions":[{"lessThan":"6165fc40efa159ba1cceee7e79…

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:5ec51089f1baba8d1a329af80dffe23c5c60514f2b2694fe41d81f0ebdaa0751 · sha256:b487b1d88658aefb… · /containers/cna/affected/1

Affected products and versions

2 source assertions

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:5ec51089f1baba8d1a329af80dffe23c5c60514f2b2694fe41d81f0ebdaa0751 · sha256:b487b1d88658aefb… · /containers/cna/affected/0

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:5ec51089f1baba8d1a329af80dffe23c5c60514f2b2694fe41d81f0ebdaa0751 · sha256:b487b1d88658aefb… · /containers/cna/affected/1

Provider-owned CVSS observations

1 source assertion

{"metric":{"attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":6.3,"baseSeverity":"MEDIUM","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"LOW","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/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:v2:5ec51089f1baba8d1a329af80dffe23c5c60514f2b2694fe41d81f0ebdaa0751 · sha256:b487b1d88658aefb… · /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:v2:5ec51089f1baba8d1a329af80dffe23c5c60514f2b2694fe41d81f0ebdaa0751 · sha256:b487b1d88658aefb… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions

{"tags":["related","third-party-advisory"],"url":"https://cna.erlef.org/cves/CVE-2026-43968.html"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:5ec51089f1baba8d1a329af80dffe23c5c60514f2b2694fe41d81f0ebdaa0751 · sha256:b487b1d88658aefb… · /containers/cna/references/0

{"tags":["patch"],"url":"https://github.com/ninenines/cowlib/commit/6165fc40efa159ba1cceee7e7981e790acba5d9c"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:5ec51089f1baba8d1a329af80dffe23c5c60514f2b2694fe41d81f0ebdaa0751 · sha256:b487b1d88658aefb… · /containers/cna/references/2

{"tags":["related"],"url":"https://osv.dev/vulnerability/EEF-CVE-2026-43968"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:5ec51089f1baba8d1a329af80dffe23c5c60514f2b2694fe41d81f0ebdaa0751 · sha256:b487b1d88658aefb… · /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.

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