How severe is CVE-2017-18361?

CVE-2017-18361 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2017-18361 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-18361?

CVE-2017-18361 affects Pylonsproject Colander. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2017-18361?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2017-18361 published?

CVE-2017-18361 was published on 2019-02-01 and last updated on 2026-06-17.

CVE-2017-18361

CVE-2017-18361 is a high-severity vulnerability in Pylonsproject Colander with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-835.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 2% (75th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-835
Affected product: Pylonsproject Colander
Published: 2019-02-01
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2017-18361?: 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.
How severe is CVE-2017-18361?: CVE-2017-18361 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2017-18361 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-18361?: CVE-2017-18361 affects Pylonsproject Colander. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2017-18361?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2017-18361 published?: CVE-2017-18361 was published on 2019-02-01 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:pylonsproject:colander:*:*:*:*:*:*:*:*

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