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CVE-2020-26149

23
FAUCET Score

CVE-2020-26149 is a high-severity vulnerability affecting NATS client libraries (nats.js, nats.ws, nats.deno) prior to specific versions, allowing for credential disclosure from a client to a server. With a CVSS score of 7.5, this network-based vulnerability requires no user interaction or privileges, posing a significant risk of sensitive information exposure. There is currently no evidence of active exploitation, public exploit code, or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.0.0-9CPE matchmatch criteria
cpe:2.3:a:linuxfoundation:nats.deno:*:*:*:*:*:*:*:*
< 2.0.0-209CPE matchmatch criteria
cpe:2.3:a:linuxfoundation:nats.js:*:*:*:*:*:node.js:*:*
< 1.0.0-111CPE matchmatch criteria
cpe:2.3:a:linuxfoundation:nats.ws:*:*:*:*:*:*:*:*

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:H/I:N/A:N

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

Exploit Intelligence

EPSS Score
1.48%
Probability of exploitation in next 30 days
EPSS Percentile
71.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0148 is in the 53rd 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 (3)

github_advisorypatch availablevia nvd_reference
View patch
npmpatch availablevia ghsa
Product: natsFixed in: 2.0.0-209
npmpatch availablevia ghsa
Product: nats.wsFixed in: 1.0.0-111

Vendor Advisories (1)

npmGHSA-82rf-q3pr-4f6phigh

Sensitive data exposure in NATS

Oct 8, 2020

References

github.com / nats-io/nats.deno/compare/v1.0.0-8...v1.0.0-9
PatchThird Party Advisory
github.com / nats-io/nats.ws/commit/0a37ac2a411ff63f0707cda69a268c5fc4079eb7
PatchThird Party Advisory
openwall.com / lists/oss-security/2020/09/30/3
Mailing ListThird Party Advisory