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CVE-2024-49768

20
FAUCET Score

CVE-2024-49768 is a race condition vulnerability affecting the Waitress WSGI server for Python. When request lookahead is enabled, a remote client can send a precisely sized request followed by a pipelined secondary request, allowing the secondary request to be processed even if the first request fails and the connection should be closed. This vulnerability has a CVSS score of 4.8 (Medium), indicating a network attack vector with high attack complexity and potential for low impact on confidentiality and integrity. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or KEV listing, though it has garnered significant community discussion.

Impacted Technologies

VendorProductVersion(s)CPE
>= 2.0.0, < 3.0.1CPE matchmatch criteria
cpe:2.3:a:agendaless:waitress:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.1CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
5.2
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.50%
Probability of exploitation in next 30 days
EPSS Percentile
39.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0050 is in the 6th percentile among its peer group of 19,956 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (13)

github_advisorypatch availablevia nvd_reference
View patch
pippatch availablevia ghsa
Product: waitressFixed in: 3.0.1
redhatpatch availablevia redhat_api
Product: Ironic content for Red Hat OpenShift Container Platform 4.12Fixed in: python-waitress-0:3.0.1-1.el9
View patch
redhatpatch availablevia redhat_api
Product: Ironic content for Red Hat OpenShift Container Platform 4.13Fixed in: python-waitress-0:3.0.1-1.el9
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Container Platform 4.14Fixed in: python-waitress-0:3.0.1-1.el9
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Container Platform 4.15Fixed in: python-waitress-0:3.0.1-1.el9
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Container Platform 4.16Fixed in: python-waitress-0:3.0.1-1.el9
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Container Platform 4.17Fixed in: python-waitress-0:3.0.1-1.el9
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenStack Platform 16.2Fixed in: python-waitress-0:2.0.0-4.el8ost
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenStack Platform 17.1 for RHEL 8Fixed in: python-waitress-0:2.0.0-4.el8ost
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenStack Platform 17.1 for RHEL 9Fixed in: python-waitress-0:2.0.0-4.el9ost
View patch
redhatno patchvia redhat_api
Product: Red Hat Ceph Storage 5Fixed in: python-waitress
redhatno patchvia redhat_api
Product: Red Hat Openshift Container Storage 4Fixed in: python-waitress

Vendor Advisories (2)

pipGHSA-9298-4cf8-g4wjcritical

Waitress has request processing race condition in HTTP pipelining with invalid first request

Oct 29, 2024
redhatCVE-2024-49768Important

waitress: python-waitress: request processing race condition in HTTP pipelining with invalid first request

Oct 29, 2024

References

github.com / Pylons/waitress/commit/e4359018537af376cf24bd13616d861e2fb76f65
Patch
github.com / Pylons/waitress/security/advisories/GHSA-9298-4cf8-g4wj
Vendor Advisory