Vulnerability details
CVE-2026-22776
yhirose cpp-httplib
cpp-httplib vulnerable to a denial of service (DOS) using a zip bomb
CVSS 4.0
8.7High
Official description
cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. Prior to version 0.30.1, a Denial of Service (DoS) vulnerability exists in cpp-httplib due to the unsafe handling of compressed HTTP request bodies (Content-Encoding: gzip, br, etc.). The library validates the payload_max_length against the compressed data size received from the network, but does not limit the size of the decompressed data stored in memory.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 8.7High | 4.0 | CVEProject cvelistV5 (CNA) (GitHub_M) | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| yhirose | cpp-httplib | < 0.30.1 | CVEProject cvelistV5 (CNA) |
References and advisories
2
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Details
- Published
- 2026-01-12
- Last updated
- 2026-01-12
- State
- Published
- Assigner (CNA)
- GitHub_M
Exploit prediction (EPSS)
0.41%
Probability of exploitation in 30 days
35.5%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- Yes
- Exploitation
- Proof of concept
- Technical impact
- Partial
Weaknesses (CWE)
- CWE-409Improper Handling of Highly Compressed Data (Data Amplification)