8.8

CVE-2026-42503: golang gopls Binding to an Unrestricted IP Address

CVSS: 8.8v3.1HighAnalyzed
AliasesUBUNTU-CVE-2026-42503DEBIAN-CVE-2026-42503
Published 06-05-2026Last modified 07-05-2026
Open JSON

Vulnerability summary

CVE-2026-42503 is a high (CVSS 8.8) Binding to an Unrestricted IP Address vulnerability in golang gopls. EPSS estimates a 0.35% chance of exploitation in the next 30 days, higher than 27.1% of scored vulnerabilities.

Overall risk
35/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.35%
0%100%
Low · +0.14 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 2
RHSA-2026:7385RHSA-2026:8291

Timeline

  1. 06-05-2026
    PublishedVulnerability first disclosed.
  2. 07-05-2026
    Last modifiedVulnerability information updated.

Description

gopls by default communicates via pipe. However, -port and -listen flags are supported as means of debugging. If -listen is given a value without an explicit host (e.g. :8080), or -port is used, gopls will listen on 0.0.0.0. As a result, users might inadvertently cause gopls to bind 0.0.0.0. This can allow a malicious party on the same network to execute code arbitrarily via gopls.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.35%

Chance of exploitation in the next 30 days

Percentile

27%

Versus all other CVEs

30-day change

+0.14 pp

From 0.21% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.35%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Debian1 product
  • goplsAll versions (No fix recorded) | < 2:0.22.0+ds-1
Golang1 product
Golang.org/x/tools1 product
Ubuntu1 product
  • goplsAll versions (No fix recorded)

4 vendors · 4 products

References

5 links