CVE-2019-16786

Exploitation

Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.

SSVC decision

Not assessed by CISA

EPSS probability

2.38% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 82.6% of scored records. A rank, not a probability.

NVD base score

7.5 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

Important. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2019-12-20 23:00Z6 YR AGO

Last updated

2024-08-05 01:24Z2 YR AGO

Reserved

2019-09-24

Assigning CNA

GitHub_M

Record state

PUBLISHED

Severity

High (CVSS 7.1)

CNA CVSS vector

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

Weaknesses

• CWE-444Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')Base

Data version

5.1

Document digest

fa95dbf74452c2c7349a81a7b279329c4b00b17f32b63a8d44c3f15ea3ed1148

• lists.fedoraproject.orgFEDORA-2020-bdcc8ffc24https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GVDHR2DNKCNQ7YQXISJ45NT4IQDX3LJ7/vendor-advisoryx_refsource_FEDORA
• lists.fedoraproject.orgFEDORA-2020-65a7744e38https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LYEOTGWJZVKPRXX2HBNVIYWCX73QYPM5/vendor-advisoryx_refsource_FEDORA
• access.redhat.comRHSA-2020:0720https://access.redhat.com/errata/RHSA-2020:0720vendor-advisoryx_refsource_REDHAT
• www.oracle.comhttps://www.oracle.com/security-alerts/cpuapr2022.htmlx_refsource_MISC
• docs.pylonsproject.orghttps://docs.pylonsproject.org/projects/waitress/en/latest/#security-fixesx_refsource_MISC
• github.comhttps://github.com/Pylons/waitress/security/advisories/GHSA-g2xc-35jw-c63px_refsource_CONFIRM
• github.comhttps://github.com/Pylons/waitress/commit/f11093a6b3240fc26830b6111e826128af7771c3x_refsource_MISC
• lists.debian.org[debian-lts-announce] 20220512 [SECURITY] [DLA 3000-1] waitress security updatehttps://lists.debian.org/debian-lts-announce/2022/05/msg00011.htmlmailing-listx_refsource_MLIST