CVE-2018-18482: An issue was discovered in libpg_query 10-1.0.2

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MEDIUM 6.5DOWNGRADE

CVE-2018-18482 is a medium-severity flaw (CVSS 6.5) affecting libpg query. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue was discovered in libpg_query 10-1.0.2. There is a memory leak in pg_query_raw_parse in pg_query_parse.c, which might lead to a denial of service.

Why this priority

Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	1.2% (top 33%)
CISA exploited list	No
Weakness	CWE-772
Published	2018-10-18
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: libpg query project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2018-10-18 18:29 UTCPublished CVE record published
2026-06-17 01:47 UTCUpdated Record last modified

libpg query project libpg query DOWNGRADE

Affected: 10-1.0.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 10-1.0.2

1. Check installed version

apt-cache policy libpg-query || rpm -q libpg-query || libpg-query --version

2. No fixed release: DOWNGRADE to a release before 10-1.0.2 (Debian / Ubuntu)

apt-cache madison libpg-query sudo apt install libpg-query=<VERSION_BEFORE_10-1.0.2> sudo apt-mark hold libpg-query

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list libpg-query sudo dnf downgrade libpg-query-<VERSION_BEFORE_10-1.0.2> sudo dnf versionlock add libpg-query

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2018-18482?

libpg query: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2018-18482 being exploited?

CVE-2018-18482 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2018-18482 affect?

CVE-2018-18482 affects libpg query. Severity is medium (CVSS 6.5). An issue was discovered in libpg_query 10-1.0.2. There is a memory leak in pg_query_raw_parse in pg_query_parse.c, which might lead to a denial of service.

How urgent is CVE-2018-18482?

Priority 45/100. Public exploit reference

References

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