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CVE-2022-28946

25
FAUCET Score

CVE-2022-28946 is a Denial of Service (DoS) vulnerability affecting Open Policy Agent (OPA) v0.39.0, specifically within the ast/parser.go component. This flaw allows an attacker to trigger out-of-range memory access by crafting expressions that the application incorrectly interprets. Rated 7.5 HIGH on the CVSS scale, it presents a low-complexity network attack vector with no user interaction required, leading to high availability impact. Currently, there is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
0.39.0CPE matchmatch criteria
cpe:2.3:a:openpolicyagent:open_policy_agent:0.39.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.97%
Probability of exploitation in next 30 days
EPSS Percentile
58.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0097 is in the 33rd percentile among its peer group of 51,485 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
gopatch availablevia ghsa
Product: github.com/open-policy-agent/opaFixed in: 0.40.0

Vendor Advisories (1)

goGHSA-x7f3-62pm-9p38high

Out of bounds memory access in github.com/open-policy-agent/opa

May 20, 2022

References

github.com / open-policy-agent/opa/commit/e9d3828db670cbe11129885f37f08cbf04935264
PatchThird Party Advisory