CVE-2018-19198

CRITICALNVD 9.89.8—

9.8

An issue was discovered in uriparser before 0.9.0. UriQuery.c allows an out-of-bounds write via a uriComposeQuery* or uriComposeQueryEx* function because the '&' character is mishandled in certain contexts.

CVSS v3: 9.8
EG Score: 9.8(medium)
EPSS: 71.2%
KEV: Not listed

Published

November 12, 2018

Last Modified

November 21, 2024

Advisory Details (4)

Auto-updated May 28, 2026

Patch available. Sources: redhat, github_commit.

generic Patch Available

[SECURITY] [DLA 1581-1] uriparser security update

https://lists.debian.org/debian-lts-announce/2018/11/msg00019.html

github_commit Patch Available

commit 864f5d4c127d (uriparser/uriparser)

Patch available: uriparser/uriparser uriparser-0.9.0 (contains commit 864f5d4c127d)

https://github.com/uriparser/uriparser/commit/864f5d4c127def386dd5cc926ad96934b297f04e

generic

uriparser/ChangeLog at uriparser-0.9.0 · uriparser/uriparser · GitHub

https://github.com/uriparser/uriparser/blob/uriparser-0.9.0/ChangeLog

redhat Patch Available

Affected: Red Hat Enterprise Linux 7.

https://access.redhat.com/errata/RHSA-2019:2280

Patch Availability(3)

Vendor / Ecosystem	Fixed in / Patch	Released	Source
ubuntu	liburiparser1 (0.8.4-1+deb9u2build0.18.04.1) @ bionic	2026-05-28	ubuntu
ubuntu	liburiparser1 (0.8.4-1ubuntu0.16.04.1~esm2) @ xenial	2026-05-28	ubuntu
redhat	uriparser-0:0.7.5-10.el7	2019-08-06	redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-787Out-of-bounds Write

All Vendor Advisories

(3)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 9× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-04 13:10 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 00:14 UTCepss_batch
2026-05-31 00:14 UTCepss_batch
2026-05-29 13:41 UTCepss_batch
2026-05-28 13:42 UTCepss_batch
2026-05-28 13:42 UTCepss_batch
2026-05-28 01:16 UTCEG score recompute
2026-05-28 01:16 UTCVendor advisory
2026-05-28 01:16 UTCGHSA enrichment
2026-05-27 13:38 UTCepss_batch
2026-05-27 13:38 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch

Frequently asked(5)

What is CVE-2018-19198?

CVE-2018-19198 is a critical vulnerability published on November 12, 2018. An issue was discovered in uriparser before 0.9.0. UriQuery.c allows an out-of-bounds write via a uriComposeQuery or uriComposeQueryEx function because the '&' character is mishandled in certain contexts.

When was CVE-2018-19198 disclosed?

CVE-2018-19198 was first published in the National Vulnerability Database on November 12, 2018, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2018-19198 actively exploited?

CVE-2018-19198 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 71.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2018-19198?

CVE-2018-19198 has a CVSS v3 base score of 9.8 (NVD).

How do I remediate CVE-2018-19198?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2018-19198, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2018-19198

Published

Last Modified

Advisory Details (4)

[SECURITY] [DLA 1581-1] uriparser security update

commit 864f5d4c127d (uriparser/uriparser)

uriparser/ChangeLog at uriparser-0.9.0 · uriparser/uriparser · GitHub

Patch Availability(3)

Weakness Classification(1)

All Vendor Advisories

Data Freshness Timeline

Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2018-19198?

Same vendor

Same CWE

CVE-2018-19198

📅 Published

🔄 Last Modified

📋 Advisory Details (4)

[SECURITY] [DLA 1581-1] uriparser security update

commit 864f5d4c127d (uriparser/uriparser)

uriparser/ChangeLog at uriparser-0.9.0 · uriparser/uriparser · GitHub

Patch Availability(3)

Weakness Classification(1)

All Vendor Advisories

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2018-19198?

🔗 Related CVEs(same vendor + same CWE)

Same vendor

Same CWE

Published

Last Modified

Advisory Details (4)

Frequently asked(5)

Related CVEs(same vendor + same CWE)