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CVE-2025-66570VulnerabilityPublished Updated

SUSE · Security update for cpp-httplib

Affects SUSESource GCVE Database

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Mentioned vulnerabilities

Authoritative record:CVE-2025-66570· Critical 10.0

Not known to be exploited · CVSS 10.0 Critical : upgrade SUSE cpp-httplib to 0.27.0 as a priority.

Data as of 31 Oct 2026, 20:20 UTC

CVSS 3.1 base score
10.0Critical
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.3% chance of exploitation in 30 days – higher than 27% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 0.27.0
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 5 Dec 2025

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 31 Oct 2026.

What to do

Upgrade yhirose/cpp-httplib to 0.27.0.

Affected software

ProductAffectedFixed in
GitHubyhirose/cpp-httplibpkg:github/yhirose/cpp-httplibOther threatsAffected
  • <0.27.0
Fixed in
  • 0.27.0

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

The update for cpp-httplib fixes these vulnerabilities. Since this is a software library, users should apply the security update provided by the vendor or project maintainers to remediate these issues. Patch status is not explicitly stated in the input data; therefore, check the vendor advisory for current remediation guidance.

Description

This security update for cpp-httplib addresses critical vulnerabilities involving IP spoofing, log poisoning, and authorization bypass. These issues arise from the acceptance and parsing of client-controlled injected HTTP headers, including unconditional acceptance of 'X-Forwarded-For' and 'X-Real-IP' headers. The vulnerabilities could allow attackers to spoof client IPs and poison access and error logs, potentially bypassing authorization mechanisms.

References

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