CVE Tools

HTTP4S

21 CVEs tracked since 2021. Since Feb 2021, none of them reached CISA KEV.

HTTP4S CVEs per month

Feb 2021 to Sep 2026. Point at a month, or focus the strip and use the arrow keys.
HTTP4S CVEs per month, with the share now in CISA KEV
MonthCVEsIn CISA KEV
2021-0220
2021-03null or fewer
2021-04null or fewer
2021-05null or fewer
2021-06null or fewer
2021-07null or fewer
2021-08null or fewer
2021-09null or fewer
2021-10null or fewer
2021-11null or fewer
2021-12null or fewer
2022-01null or fewer
2022-02null or fewer
2022-03null or fewer
2022-04null or fewer
2022-05null or fewer
2022-06null or fewer
2022-07null or fewer
2022-08null or fewer
2022-09null or fewer
2022-10null or fewer
2022-11null or fewer
2022-12null or fewer
2023-01null or fewer
2023-02null or fewer
2023-03null or fewer
2023-04null or fewer
2023-05null or fewer
2023-06null or fewer
2023-07null or fewer
2023-08null or fewer
2023-09null or fewer
2023-10null or fewer
2023-11null or fewer
2023-12null or fewer
2024-01null or fewer
2024-02null or fewer
2024-03null or fewer
2024-04null or fewer
2024-05null or fewer
2024-06null or fewer
2024-07null or fewer
2024-08null or fewer
2024-09null or fewer
2024-10null or fewer
2024-11null or fewer
2024-12null or fewer
2025-01null or fewer
2025-02null or fewer
2025-03null or fewer
2025-04null or fewer
2025-05null or fewer
2025-06null or fewer
2025-07null or fewer
2025-08null or fewer
2025-09null or fewer
2025-10null or fewer
2025-11null or fewer
2025-12null or fewer
2026-01null or fewer
2026-02null or fewer
2026-03null or fewer
2026-04null or fewer
2026-05null or fewer
2026-06null or fewer
2026-07null or fewer
2026-08null or fewer
2026-09190

Products

The products that kept showing up in HTTP4S's monthly top three, with their CVEs summed over those months.

  1. HTTP4S192 months
  2. Blaze22 months

Latest CVEs

The 15 most recently published vulnerabilities affecting HTTP4S.

  1. CVE-2026-61741http4s-scala-xml has an XML External Entity (XXE) processing issue9.3
  2. CVE-2026-88975Http4s: Ember HTTP/2 buffers a frame's declared payload before checking SETTINGS_MAX_FRAME_SIZE7.5
  3. CVE-2026-69206Http4s: DigestAuth allows replay of captured requests5.9
  4. CVE-2026-69202Http4s Ember HTTP/2: unbounded inbound body buffering7.5
  5. CVE-2026-69218Http4s Ember HTTP/2: unbounded continuation frame accumulation7.5
  6. CVE-2026-69203Http4s Ember HTTP/2: does not enforce SETTINGS_MAX_CONCURRENT_STREAMS7.5
  7. CVE-2026-69217Http4s: Ember Server accepts duplicate Content-Length headers8.7
  8. CVE-2026-69210Http4s: WebSocket decoder accepts negative length, causing infinite decode loop7.5
  9. CVE-2026-69215Http4s: CookieJar middleware matches by substring, leaking cookies cross-origin6.8
  10. CVE-2026-69205Http4s: Ember Transfer-Encoding value parsing (TE.CL / TE.0 request smuggling)8.7
  11. CVE-2026-69212Http4s: FollowRedirect middleware leaks credentials over https->http same-authority redirect5.9
  12. CVE-2026-69213Http4s Ember HTTP/2: unbounded outbound frame queue7.5
  13. CVE-2026-69214Http4s: CookieJar middleware accepts arbitrary Set-Cookie domain6.8
  14. CVE-2026-69201Http4s: ResourceService and Webjar Service path escape via percent-encoded separators5.9
  15. CVE-2026-69216Http4s: Ember chunk parser lenience (TE.TE request smuggling)5.4

The record

Peak rank
#56 in Sep 2026
Busiest month shown
Sep 2026, 19 CVEs
Months with a KEV entry
0 since Feb 2021
Monthly snapshots
2 since 2021
HTTP4S's full record, month by month

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