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CVE-2018-16848

23
FAUCET Score

CVE-2018-16848 describes a Denial of Service (DoS) vulnerability in OpenStack Mistral, affecting versions up to and including 7.0.3. An authenticated attacker can trigger resource exhaustion by submitting a specially crafted YAML workflow definition containing nested anchors. This vulnerability has a CVSS score of 6.5 (Medium), indicating it can be exploited remotely with low attack complexity and requires low privileges, leading to high availability impact. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 7.0.3CPE matchmatch criteria
cpe:2.3:a:redhat:openstack-mistral:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.5MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.18%
Probability of exploitation in next 30 days
EPSS Percentile
64.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0118 is in the 78th percentile among its peer group of 21,957 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 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 (6)

pippatch availablevia ghsa
Product: mistralFixed in: 10.0.0
redhatvendor investigatingvia nvd_reference
View patch
redhatend of lifevia redhat_api
Product: Red Hat OpenStack Platform 10 (Newton)Fixed in: openstack-mistral
redhatend of lifevia redhat_api
Product: Red Hat OpenStack Platform 13 (Queens)Fixed in: openstack-mistral
redhatend of lifevia redhat_api
Product: Red Hat OpenStack Platform 14 (Rocky)Fixed in: openstack-mistral
redhatend of lifevia redhat_api
Product: Red Hat OpenStack Platform 15 (Stein)Fixed in: openstack-mistral

Vendor Advisories (2)

pipGHSA-443j-6p7g-6v4whigh

OpenStack Mistral DoS

May 24, 2022
redhatCVE-2018-16848Moderate

openstack-mistral: Potential Mistral Denial of Service handling recursive YAML anchor expansion

Jun 10, 2020

References

bugs.launchpad.net / mistral/+bug/1785657
Third Party Advisory
bugzilla.redhat.com / show_bug.cgi
Issue TrackingVendor Advisory