> CVE-2026-29076 [MEDIUM]

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PUBLISHED
2026-03-07 16:15
MODIFIED
2026-03-07 16:15
CVSS_SCORE V3
5.9
EPSS (Prob. Exploit)
0.63%
Top 50.6%
DATA SOURCES:
NVD 🔗 2026-03-07 CWE MITRE 🔗 2026-11-01 FIRST EPSS 🔗 2026-10-25 OSV 🔗 2026-03-14

> DESCRIPTION

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.

> AFFECTED_PRODUCTS

ℹ️ Aucun produit affecté n'a encore été publié par NVD pour cette CVE.

> CVSS V3 METRICS

CVSS_VECTOR
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
EXPLOITABILITY
2.2
IMPACT
3.6

> MÉTRIQUES CVSS DÉTAILLÉES

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Métrique Valeur Interprétation
AV (Vecteur d'Attaque)
Attack Vector
Network (N)
Exploit possible à distance via réseau (HTTP, API, etc.)
AC (Complexité d'Attaque)
Attack Complexity
High (H)
Conditions spécifiques doivent être réunies pour exploiter
PR (Privilèges Requis)
Privileges Required
None (N)
Aucune authentification requise
UI (Interaction Utilisateur)
User Interaction
None (N)
Aucune interaction utilisateur nécessaire
S (Périmètre)
Scope
Unchanged (U)
Impact reste dans le périmètre du composant compromis
C (Impact Confidentialité)
Confidentiality Impact
None (N)
Aucune divulgation d'informations
I (Impact Intégrité)
Integrity Impact
None (N)
Aucune modification de données possible
A (Impact Disponibilité)
Availability Impact
High (H)
Interruption totale du service possible

> RÉSUMÉ DES IMPACTS

Confidentialité
None
Aucune divulgation d'informations
Intégrité
None
Aucune modification de données possible
Disponibilité
High
Interruption totale du service possible

> WEAKNESSES

CWE-674 CWE-1333

> CWE DETAILED DESCRIPTIONS

CWE-674: Uncontrolled Recursion - The product does not properly control the amount of recursion that takes place, consuming excessive resources, such as allocated memory or the program stack. | CWE-1333: Inefficient Regular Expression Complexity - The product uses a regular expression with a worst-case computational complexity that is inefficient and possibly exponential.

> OSV (GOOGLE OPEN SOURCE VULNERABILITIES)

cpp-httplib: Stack Overflow Denial of Service (DoS) via std::regex in multipart filename parsing

AFFECTED PACKAGES:
Unknown / Unknown
149 versions affected
ALIASES:
GHSA-qq6v-r583-3h69

> HISTORIQUE DES MODIFICATIONS

Première apparition
07/03/2026 16:15
Source: NVD
📊 ENRICHISSEMENT 01/06/2026 06:01
CWE
Champ modifié: Description CWE
Ancienne valeur:
CWE-674: Uncontrolled Recursion - The product does not properly control the amount of recursion that takes place, consuming excessive resources, such as allocated memory or the program stack. | CWE-1...
Nouvelle valeur:
CWE-674: Uncontrolled Recursion - The product does not properly control the amount of recursion that takes place, consuming excessive resources, such as allocated memory or the program stack. | CWE-1...
📊 ENRICHISSEMENT 01/04/2026 06:02
CWE
Champ modifié: Description CWE
Ancienne valeur:
N/A
Nouvelle valeur:
CWE-674: Uncontrolled Recursion - The product does not properly control the amount of recursion that takes place, consuming excessive resources, such as allocated memory or the program stack. | CWE-1...
Total des modifications: 2 Dernière mise à jour: 5 months ago

> REFERENCES

https://github.com/yhirose/cpp-httplib/commit/de296af3eb5b0d5c116470e033db900e48...
https://github.com/yhirose/cpp-httplib/releases/tag/v0.37.0
https://github.com/yhirose/cpp-httplib/security/advisories/GHSA-qq6v-r583-3h69
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