CVE-2019-18277
CVSS v3
7.5
HIGH
Score EPSS
10.1 %
probabilité d’exploitation au 2026-10-05
CISA KEV
Non
exploitation connue
Exploitation
—
statut SSVC
Description
A flaw was found in HAProxy before 2.0.6. In legacy mode, messages featuring a transfer-encoding header missing the "chunked" value were not being correctly rejected. The impact was limited but if combined with the "http-reuse always" setting, it could be used to help construct an HTTP request smuggling attack against a vulnerable component employing a lenient parser that would ignore the content-length header as soon as it saw a transfer-encoding one (even if not entirely valid according to the specification).
Détails techniques
- Publiée le
- 2019-10-23
Questions fréquentes
Qu’est-ce que CVE-2019-18277 ?
A flaw was found in HAProxy before 2.0.6. In legacy mode, messages featuring a transfer-encoding header missing the "chunked" value were not being correctly rejected. The impact was limited but if combined with the "http-reuse always" setting, it could be used to help construct an HTTP request smuggling attack against a vulnerable component employing a lenient parser that would ignore the content-length header as soon as it saw a transfer-encoding one (even if not entirely valid according to the specification).
CVE-2019-18277 est-elle activement exploitée ?
Aucune exploitation active de CVE-2019-18277 n’est confirmée. Son score EPSS était de 10.1 % au 2026-10-05, soit la probabilité estimée d’exploitation dans les 30 prochains jours.
Quel est le score CVSS de CVE-2019-18277 ?
CVE-2019-18277 a un score de base CVSS v3 de 7.5 (gravité HIGH).
CVE-2019-18277 touche-t-elle votre environnement ?
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Autres vulnérabilités 2019 à trier
Classées par probabilité d’exploitation (EPSS).