CVE-2026-29076

Published: Mar 07, 2026 Last Modified: Mar 09, 2026
ExploitDB:
Other exploit source:
Google Dorks:
MEDIUM 5,9
Source: [email protected]
Attack Vector: network
Attack Complexity: high
Privileges Required: none
User Interaction: none
Scope: unchanged
Confidentiality: none
Integrity: none
Availability: high

Description

AI Translation Available

cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. Prior to version 0.37.0, cpp-httplib uses std::regex (libstdc++) to parse RFC 5987 encoded filename* values in multipart Content-Disposition headers. The regex engine in libstdc++ implements backtracking via deep recursion, consuming one stack frame per input character. An attacker can send a single HTTP POST request with a crafted filename* parameter that causes uncontrolled stack growth, resulting in a stack overflow (SIGSEGV) that crashes the server process. This issue has been patched in version 0.37.0.

EPSS (Exploit Prediction Scoring System)

Trend Analysis

EPSS (Exploit Prediction Scoring System)

Prevede la probabilità di sfruttamento basata su intelligence sulle minacce e sulle caratteristiche della vulnerabilità.

EPSS Score
0,0004
Percentile
0,1th
Updated

EPSS Score Trend (Last 9 Days)

674

Uncontrolled Recursion

Draft
Abstraction: Class Structure: Simple
Common Consequences
Security Scopes Affected:
Availability Confidentiality
Potential Impacts:
Dos: Resource Consumption (Cpu) Dos: Resource Consumption (Memory) Read Application Data
Applicable Platforms
All platforms may be affected
View CWE Details
1333

Inefficient Regular Expression Complexity

Draft
Abstraction: Base Structure: Simple
Common Consequences
Security Scopes Affected:
Availability
Potential Impacts:
Dos: Resource Consumption (Cpu)
Applicable Platforms
All platforms may be affected
Likelihood of Exploit: High
View CWE Details
Application

Cpp-Httplib by Yhirose

Product Information
Vendor Yhirose
Product Cpp-Httplib
Version Range Affected
To 0.37.0 (exclusive)
cpe:2.3:a:yhirose:cpp-httplib:*:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
https://github.com/yhirose/cpp-httplib/commit/de296af3eb5b0…
https://github.com/yhirose/cpp-httplib/commit/de296af3eb5b0d5c116470e033db900e4…
https://github.com/yhirose/cpp-httplib/releases/tag/v0.37.0
https://github.com/yhirose/cpp-httplib/releases/tag/v0.37.0
https://github.com/yhirose/cpp-httplib/security/advisories/…
https://github.com/yhirose/cpp-httplib/security/advisories/GHSA-qq6v-r583-3h69