CVE-2017-18361

HIGHNVD 7.5

7.5

In Pylons Colander through 1.6, the URL validator allows an attacker to potentially cause an infinite loop thereby causing a denial of service via an unclosed parenthesis.

CVSS v3: 7.5
EG Score: —
EPSS: 31.6%
KEV: Not listed

Published

February 1, 2019

Last Modified

November 21, 2024

References (4)

cve@mitrehttps://github.com/Pylons/colander/issues/290
cve@mitrehttps://github.com/Pylons/colander/pull/323
af854a3a-2127-422b-91ae-364da2661108https://github.com/Pylons/colander/issues/290
af854a3a-2127-422b-91ae-364da2661108https://github.com/Pylons/colander/pull/323

Affected Packages

(1 across 1 ecosystem)

PyPI(1)

Package	Vulnerable range	Fixed in	Dependents
colander	0.1 ... 1.6.0 (42 versions)	1.7.0	—

Weakness Classification(1)

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

CWE-835Loop with Unreachable Exit Condition (Infinite Loop)

Data Freshness Timeline

(refreshed 7× in last 7d / 7× 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.

2026-05-27 20:35 UTCOSV refresh
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-2017-18361?

CVE-2017-18361 is a high vulnerability published on February 1, 2019. In Pylons Colander through 1.6, the URL validator allows an attacker to potentially cause an infinite loop thereby causing a denial of service via an unclosed parenthesis.

When was CVE-2017-18361 disclosed?

CVE-2017-18361 was first published in the National Vulnerability Database on February 1, 2019, 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-2017-18361 actively exploited?

CVE-2017-18361 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 31.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2017-18361?

CVE-2017-18361 has a CVSS v3 base score of 7.5 (NVD).

How do I remediate CVE-2017-18361?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2017-18361, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2017-18361

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