Skip to content
Fencer Vulns
high 7.5

CVE-2019-13126 json

Integer Overflow or Wraparound in NATS Server

published 2019-07-29 7 y ago modified 2026-09-10 1 mo ago also GHSA-jp4j-47f9-2vc3 , GO-2022-0852 , EUVD-2021-1121

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.8%
EPSS 1.8% chance of exploitation in 30 days, percentile 78%
public exploits
0
none known

Summary

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.

Patch / fix

  • go github.com/nats-io/nats-server/v2 2.2.0
  • linuxfoundation nats-server 2.0.2

Exploit prediction

1.77% chance of exploitation in the next 30 days, higher than 78% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P
GitHub 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
go github.com/nats-io/nats-server/v2
<2.2.0
2.2.0
go github.com/nats-io/nats-server
all versions
 no fix listed

Classification

Weakness
  • CWE-190 Integer Overflow or Wraparound

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.