{"id":"CVE-2026-69208","title":"Http4s is a Scala interface for HTTP services","summary":"Http4s is a Scala interface for HTTP services. Prior to 0.23.35 and 1.0.0-M47, the DigestAuth server middleware removes fresh nonces and stops eviction at the first stale nonce because its stale-nonce comparison is inverted. On an applic…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-400","CWE-401"],"vendor":"http4s","product":"http4s","affected":["http4s < 0.23.35","http4s >= 1.0.0-M1, < 1.0.0-M47"],"patched":["org.http4s:http4s-ember-server_2.12 0.23.35","org.http4s:http4s-ember-server_2.13 0.23.35","org.http4s:http4s-ember-server_3 0.23.35","org.http4s:http4s-ember-server_2.13 1.0.0-M47","org.http4s:http4s-ember-server_3 1.0.0-M47"],"published":"2026-09-15","updated":"2026-09-17","sourceUpdated":"2026-09-17T17:16:46.390","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-69208","references":[{"url":"https://github.com/http4s/http4s/commit/8cfeda8472954d631dfbe5dc026463a27653e482","label":"security-advisories@github.com"},{"url":"https://github.com/http4s/http4s/releases/tag/v0.23.35","label":"security-advisories@github.com"},{"url":"https://github.com/http4s/http4s/releases/tag/v1.0.0-M47","label":"security-advisories@github.com"},{"url":"https://github.com/http4s/http4s/security/advisories/GHSA-fm4g-76c9-7w69","label":"security-advisories@github.com"},{"url":"https://github.com/advisories/GHSA-fm4g-76c9-7w69"}],"tags":["nvd","cve.org","ghsa","maven"],"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-09-17T16:41:41.318498Z"},"epss":0.00407,"epssPercentile":0.34761,"aliases":["GHSA-fm4g-76c9-7w69"],"ecosystem":"maven","ingestedAt":"2026-09-15T19:42:58.803Z","slug":"CVE-2026-69208","body":"## Overview\n\nHttp4s is a Scala interface for HTTP services. Prior to 0.23.35 and 1.0.0-M47, the DigestAuth server middleware removes fresh nonces and stops eviction at the first stale nonce because its stale-nonce comparison is inverted. On an application that protects at least one route with DigestAuth, an unauthenticated attacker can repeatedly trigger authentication challenges, causing the persistent nonce map to grow until the JVM exhausts heap memory. This issue is fixed in versions 0.23.35 and 1.0.0-M47.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Package advisory (CVE-2026-69208)\n\nAffected packages:\n\n- `org.http4s:http4s-ember-server_2.12 <= 0.23.34`\n- `org.http4s:http4s-ember-server_2.13 <= 0.23.34`\n- `org.http4s:http4s-ember-server_3 <= 0.23.34`\n- `org.http4s:http4s-ember-server_2.13 >= 1.0.0-M1, <= 1.0.0-M46`\n- `org.http4s:http4s-ember-server_3 >= 1.0.0-M1, <= 1.0.0-M46`\n\nPatched in:\n\n- `org.http4s:http4s-ember-server_2.12 0.23.35`\n- `org.http4s:http4s-ember-server_2.13 0.23.35`\n- `org.http4s:http4s-ember-server_3 0.23.35`\n- `org.http4s:http4s-ember-server_2.13 1.0.0-M47`\n- `org.http4s:http4s-ember-server_3 1.0.0-M47`\n\nSource: https://github.com/advisories/GHSA-fm4g-76c9-7w69","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}