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CVE-2019-12243

24
FAUCET Score

CVE-2019-12243 describes an Incorrect Access Control vulnerability affecting Istio versions 1.1.x through 1.1.6. This flaw carries a CVSS score of 7.5 (HIGH), indicating that an adjacent network attacker could achieve high confidentiality, integrity, and availability impacts with high attack complexity, without requiring user interaction or privileges. Despite its severity, there is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
>= 1.1, <= 1.1.6CPE matchmatch criteria
cpe:2.3:a:istio:istio:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.5HIGH

CVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
ADJACENT_NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.6
Impact Score
5.9
CvssVersion
3.0

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 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0118 is in the 80th percentile among its peer group of 239 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.2 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

gopatch availablevia ghsa
Product: istio.io/istioFixed in: 1.1.7

Vendor Advisories (1)

goGHSA-6g5f-f5pm-mjrghigh

Istio may not check inbound TCP connections against istio-policy

Feb 15, 2022

References

istio.io / about/notes
Release NotesVendor Advisory
istio.io / blog/2019/cve-2019-12243
ExploitVendor Advisory