{"id":"CVE-2026-54147","title":"http4k is a functional toolkit for Kotlin HTTP applications","summary":"http4k is a functional toolkit for Kotlin HTTP applications. Prior to 4.51.0.0, 5.42.0.0, and 6.50.0.0, DigestAuthProvider.verify in http4k-security-digest ignores its configured algorithm parameter and verifies every Digest response wit…","severity":"medium","cvss":6.5,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N","cwe":["CWE-327"],"vendor":"http4k","product":"http4k","affected":["http4k < 4.51.0.0","http4k >= 5.0.0.0, < 5.42.0.0","http4k >= 6.0.0.0, < 6.50.0.0"],"patched":["org.http4k:http4k-security-digest 5.42.0.0","org.http4k:http4k-security-digest 6.50.0.0"],"published":"2026-09-18","updated":"2026-09-18","sourceUpdated":"2026-09-18T18:17:07.110","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-54147","references":[{"url":"https://github.com/http4k/http4k/commit/65d23d99fc5afbe34f29d8f61d0a003fbebb381c","label":"security-advisories@github.com"},{"url":"https://github.com/http4k/http4k/releases/tag/6.50.0.0","label":"security-advisories@github.com"},{"url":"https://github.com/http4k/http4k/security/advisories/GHSA-vxxm-wwqh-mh47","label":"security-advisories@github.com"},{"url":"https://github.com/http4k/http4k/commit/65d23d99fc"},{"url":"https://github.com/advisories/GHSA-vxxm-wwqh-mh47"}],"tags":["nvd","cve.org","ghsa","maven"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-18T17:27:37.221207Z"},"aliases":["GHSA-vxxm-wwqh-mh47"],"ecosystem":"maven","ingestedAt":"2026-08-17T22:01:16.781Z","epss":0.00197,"epssPercentile":0.09697,"slug":"CVE-2026-54147","body":"## Overview\n\nhttp4k is a functional toolkit for Kotlin HTTP applications. Prior to 4.51.0.0, 5.42.0.0, and 6.50.0.0, DigestAuthProvider.verify in http4k-security-digest ignores its configured algorithm parameter and verifies every Digest response with hardcoded MD5. Deployments configured for SHA-256 therefore receive weaker MD5-based verification, exposing Digest authentication to collision-related attack paths that depend on the hash function's collision resistance. This issue is fixed in versions 4.51.0.0, 5.42.0.0, and 6.50.0.0.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Package advisory (CVE-2026-54147)\n\nAffected packages:\n\n- `org.http4k:http4k-security-digest >= 5.0.0.0, < 5.42.0.0`\n- `org.http4k:http4k-security-digest <= 4.48.2.0`\n- `org.http4k:http4k-security-digest >= 6.0.0.0, < 6.50.0.0`\n\nPatched in:\n\n- `org.http4k:http4k-security-digest 5.42.0.0`\n- `org.http4k:http4k-security-digest 6.50.0.0`\n\nSource: https://github.com/advisories/GHSA-vxxm-wwqh-mh47","depth":"sunlit","depthScore":36,"depthScoreParts":{"impact":35.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}