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TI-2026-64881 Aliases CVE-2026-100725GHSA-jggj-q26h-3m3c

http4k before 6.48.0.0 Cookie Scoping Bypass via BasicCookieStorage

Priority LOW 36CWE-200Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
Present
Impact type
Information disclosure
Confidentiality · integrity · availability
High · Low · None
Fix status
Partial Red Hat: 1 without a fix

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-200.

Summary

http4k (Maven artifact org.http4k:http4k-core) before 6.48.0.0, 5.42.0.0, and 4.51.0.0 ships a BasicCookieStorage (client-side cookie store used by ClientFilters.Cookies) that does not enforce RFC 6265 scoping rules for the cookie domain, path, and Secure attributes. When a single BasicCookieStorage instance is used to talk to more than one origin or scheme, cookies stored for one origin can be sent to other origins, and cookies marked Secure can be sent over plain HTTP, potentially disclosing session cookies or other sensitive values to unauthorized hosts or network observers. Clients that use a storage instance for a single origin are not affected.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00239 15th percentileScored 2026-11-07
Fix Partial http4k (http4k): 6.48.0.0, 5.42.0.0, 4.51.0.0Red Hat: 1 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
http4khttp4k6.0.0.0 to before 6.48.0.06.48.0.0Patch availableCNA
http4khttp4k5.0.0.0 to before 5.42.0.05.42.0.0Patch availableCNA
http4khttp4kbefore 4.51.0.04.51.0.0Patch availableCNA
  • http4k Vendorhttp4k Affected 6.0.0.0 to before 6.48.0.0 Fixed in 6.48.0.0 Patch available CNA
  • http4k Vendorhttp4k Affected 5.0.0.0 to before 5.42.0.0 Fixed in 5.42.0.0 Patch available CNA
  • http4k Vendorhttp4k Affected before 4.51.0.0 Fixed in 4.51.0.0 Patch available CNA

Remediation

  • Fix · CNA http4k (http4k) Fixed in 6.48.0.0
  • Fix · CNA http4k (http4k) Fixed in 5.42.0.0
  • Fix · CNA http4k (http4k) Fixed in 4.51.0.0

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    http4k 4.51.0.0, 5.42.0.0

    3 records Highest priority Priority LOW 3 LOW

    Other records, highest priority first

    • TI-2026-64972 http4k before 6.48.0.0 Digest Authentication Replay Protection BypassPriority LOW 36
    • TI-2026-64880 http4k before 6.49.0.0 Host Header Routing Bypass via reverseProxyPriority LOW 28
    Show all 3 records →
  • Release ·

    http4k 6.48.0.0

    2 records Highest priority Priority LOW 2 LOW

    Other records, highest priority first

    • TI-2026-64972 http4k before 6.48.0.0 Digest Authentication Replay Protection BypassPriority LOW 36
    Show all 2 records →

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Fuse 7AffectedNo fix planned: Out of support scope

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-100725
  2. 2026-10-03 Alias added: GHSA-jggj-q26h-3m3c
  3. 2026-10-07 Affected versions changed · Red Hat
  4. 2026-10-07 CVSS score added · Red Hat
  5. 2026-10-29 Affected versions changed · CNA

References

Patch 1

Advisory 1

  • TI-2024-36944 http4k has a potential XXE (XML External Entity Injection) vulnerability CVSS 3.1CRITICAL 9.8
  • TI-2026-83683 Missing body integrity check in http4k Digest auth-int CVSS 4.0HIGH 8.2
  • TI-2026-38700 http4k: Unbounded gzip decompression in `ServerFilters.GZip` / `RequestFilters.GunZip` allowed memory-exhaustion DoS CVSS 3.1HIGH 7.5
  • TI-2026-39062 http4k: `DigestAuthProvider.verify` did not bind to request URI CVSS 3.1HIGH 8.1
  • TI-2026-64972 http4k before 6.48.0.0 Digest Authentication Replay Protection Bypass CVSS 4.0HIGH 8.2
  • TI-2026-83682 Path traversal in http4k ThymeleafTemplates lets attackers read files CVSS 4.0HIGH 8.2
See all 8 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences