CVE-2019-13126

mediumpriority · track · 31EPSS 0.018 · 78 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

1.77% (78th) EPSS

CVSS 5 · medium

Is it mine?

4 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · osv · nvd

EPSS · scored 2026-10-22

An integer overflow in NATS Server before 2.0.2 allows a remote attacker to crash the server by sending a crafted request. If authentication is enabled, then the remote attacker must have first authenticated.

cvss

Technical severity, 0–10. One row per scoring source.

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5–7.5

v2.05mediumAV:N/AC:L/Au:N/C:N/I:N/A:Pprimary · NVD / NIST USexploitability 10 · impact 2.9

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 3.6

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · OSV

v3.16.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-190USprimaryCWE-190US

affected products (4)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
linuxfoundation nats-server< 2.0.2nvdUScpe:2.3:a:linuxfoundation:nats-server:*:*:*:*:*:*:*:*
Go github.com/nats-io/nats-serverall versionsosvUSpkg:golang/github.com/nats-io/nats-server
Go github.com/nats-io/nats-server/v2< 2.2.0osvUSpkg:golang/github.com/nats-io/nats-server/v2

advisories (2)

Vendor and ecosystem advisories describing this.

GHSA-jp4j-47f9-2vc3Integer Overflow or Wraparound in NATS Server2021-05-18ghsa · osvUS
An integer overflow in NATS Server before 2.2.0 allows a remote attacker to crash the server by sending a crafted request. ### Specific Go Packages Affected github.com/nats-io/nats-server/v2/server
GO-2022-0852Integer Overflow or Wraparound in NATS Server in github.com/nats-io/nats-server2024-08-21vendor · osvUS
Integer Overflow or Wraparound in NATS Server in github.com/nats-io/nats-server

also known as (5)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd osv nvd NVD CVE.org MITRE

published 2019-07-29modified 2026-06-17

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+4621 more

references (9)

External citations — patches, advisories, analysis.

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