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TI-2020-09400 Aliases CVE-2020-11709GHSA-fxvr-q2f8-9vxv

cpp-httplib through 0.5.8 does not filter \r\n in parameters passed into the set_redirect…

Priority LOW 36CWE-74Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · High · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

Summary

cpp-httplib through 0.5.8 does not filter \r\n in parameters passed into the set_redirect and set_header functions, which creates possibilities for CRLF injection and HTTP response splitting in some specific contexts.

Why it matters now

EPSS 0.01684 77th percentileScored 2026-11-07
Public exploit Yes 2 exploit referencesTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:yhirose:cpp-httplib:*:*:*:*:*:*:*:*up to 0.5.8Vulnerableyhirose
  • cpe:2.3:a:yhirose:cpp-httplib:*:*:*:*:*:*:*:* Versions up to 0.5.8 Vulnerable ·yhirose

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-11709
  2. 2026-10-03 Alias added: GHSA-fxvr-q2f8-9vxv

References

Exploit 2

  • TI-2026-33163 cpp-httplib: HTTP header value percent-decoding in server-side `parse_header` enables CRLF injection CVSS 3.1CRITICAL 9.9
  • TI-2026-18294 cpp-httplib vulnerable to a denial of service (DOS) using a zip bomb CVSS 4.0HIGH 8.7
  • TI-2026-17313 cpp-httplib has CRLF injection in http headers CVSS 4.0HIGH 7.7
  • TI-2026-33146 cpp-httplib DoS: Negative chunk-size in chunked Transfer-Encoding CVSS 3.1HIGH 7.5
  • TI-2026-22709 Uncontrolled resource consumption in yhirose cpp-httplib CVSS 3.1HIGH 7.5
  • TI-2025-33556 cpp-httplib Unbounded Memory Allocation in Chunked/No-Length Requests Vulnerability CVSS 3.1HIGH 7.5
See all 19 →

Sources

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