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CVE-2026-41683

i18next-http-middleware is a middleware to be used with Node.js web frameworks like express or Fastify and also for Deno. Prior to version 3.9.3, i18next-http-middleware wrote user-controlled language values into the Content-Language response header after passing them through utils.escape(), which is an HTML-entity encoder that does not strip carriage return, line feed, or other control characters. When the application used an older i18next (< 19.5.0) that still exercised the backward-compatibil
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:fdbca8224bb5c6b3f5e7d0ba43ba9dce5e12d83542ba93ae20e4f638e5c5ded6
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-113","description":"CWE-113: Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting')","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:e0f16a4c372155c0fdf99e4c11051efe2b78db9cf9f8c351ce0180e906fc57cd · sha256:98e0b29cb50a53b7… · /containers/cna/problemTypes/1/descriptions/0

{"cweId":"CWE-79","description":"CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:e0f16a4c372155c0fdf99e4c11051efe2b78db9cf9f8c351ce0180e906fc57cd · sha256:98e0b29cb50a53b7… · /containers/cna/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion
{"product":"i18next-http-middleware","vendor":"i18next","versions":[{"status":"affected","version":"< 3.9.3"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:e0f16a4c372155c0fdf99e4c11051efe2b78db9cf9f8c351ce0180e906fc57cd · sha256:98e0b29cb50a53b7… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":8.6,"baseSeverity":"HIGH","confidentialityImpact":"LOW","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:e0f16a4c372155c0fdf99e4c11051efe2b78db9cf9f8c351ce0180e906fc57cd · sha256:98e0b29cb50a53b7… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-113","description":"CWE-113: Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:e0f16a4c372155c0fdf99e4c11051efe2b78db9cf9f8c351ce0180e906fc57cd · sha256:98e0b29cb50a53b7… · /containers/cna/problemTypes/1/descriptions/0
{"cweId":"CWE-79","description":"CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:e0f16a4c372155c0fdf99e4c11051efe2b78db9cf9f8c351ce0180e906fc57cd · sha256:98e0b29cb50a53b7… · /containers/cna/problemTypes/0/descriptions/0

Source references

1 source assertion
{"name":"https://github.com/i18next/i18next-http-middleware/security/advisories/GHSA-c3h8-g69v-pjrg","tags":["x_refsource_CONFIRM"],"url":"https://github.com/i18next/i18next-http-middleware/security/advisories/GHSA-c3h8-g69v-pjrg"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:e0f16a4c372155c0fdf99e4c11051efe2b78db9cf9f8c351ce0180e906fc57cd · sha256:98e0b29cb50a53b7… · /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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