IT-Sentinel

« BACK_TO_HOME

PUBLISHED

2026-05-29 20:16

MODIFIED

2026-05-29 20:23

CVSS_SCORE V3

9.9

EPSS (Prob. Exploit)

0.30%

Top 77.9%

DATA SOURCES:

NVD 🔗 2026-05-29 CWE MITRE 🔗 2026-11-01 FIRST EPSS 🔗 2026-11-01 OSV 🔗 2026-11-02

> DESCRIPTION

cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. Prior to 0.44.0, when cpp-httplib's server parses an incoming request, it applies percent-decoding to every header value except Location and Referer. The validity check (is_field_value) is run before decoding, so encoded %0D%0A passes the check and is then expanded to a literal \r\n byte pair inside the stored header value. This vulnerability is fixed in 0.44.0.

> 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:L/PR:N/UI:N/S:C/C:L/I:H/A:L

EXPLOITABILITY

3.9

IMPACT

5.3

> MÉTRIQUES CVSS DÉTAILLÉES

                CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:L
            

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	Low (L)	Peu de conditions requises 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	Changed (C)	Impact s'étend au-delà du composant compromis
C (Impact Confidentialité) Confidentiality Impact	Low (L)	Divulgation limitée d'informations
I (Impact Intégrité) Integrity Impact	High (H)	Modification totale des données possible
A (Impact Disponibilité) Availability Impact	Low (L)	Interruption partielle du service possible

> RÉSUMÉ DES IMPACTS

Confidentialité

Low

Divulgation limitée d'informations

Intégrité

High

Modification totale des données possible

Disponibilité

Low

Interruption partielle du service possible

> WEAKNESSES

CWE-93 CWE-444

> CWE DETAILED DESCRIPTIONS

CWE-93: Improper Neutralization of CRLF Sequences - The product uses CRLF (carriage return line feeds) as a special element, e.g. to separate lines or records, but it does not neutralize or incorrectly neutralizes CRLF sequences from inputs. | CWE-444: Inconsistent Interpretation of HTTP Requests - The product acts as an intermediary HTTP agent (such as a proxy or firewall) in the data flow between two entities such as a client and server, but it does not interpret malformed HTTP requests or responses in ways that are consistent with how the messages will be processed by those entities that are at the ultimate destination.

> OSV (GOOGLE OPEN SOURCE VULNERABILITIES)

cpp-httplib: HTTP header value percent-decoding in server-side `parse_header` enables CRLF injection

AFFECTED PACKAGES:

Unknown / Unknown

162 versions affected

ALIASES:

GHSA-xjxg-64p4-vj4m

> HISTORIQUE DES MODIFICATIONS

Première apparition

29/05/2026 20:16

Source: NVD

📊 ENRICHISSEMENT 01/11/2026 06:59

CWE

Champ modifié: Description CWE

Ancienne valeur:

CWE-93: Improper Neutralization of CRLF Sequences ('CRLF Injection') - The product uses CRLF (carriage return line feeds) as a special element, e.g. to separate lines or records, but it does not neutr...

Nouvelle valeur:

📊 ENRICHISSEMENT 01/06/2026 06:01

CWE