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CVE-2017-18361

26
FAUCET Score

CVE-2017-18361 is a denial-of-service vulnerability affecting Pylons Colander through version 1.6, where an unclosed parenthesis in the URL validator can lead to an infinite loop. This high-severity vulnerability (CVSS 7.5) is easily exploitable over the network with low attack complexity, potentially causing a complete denial of service. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.6CPE matchmatch criteria
cpe:2.3:a:pylonsproject:colander:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.5HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.78%
Probability of exploitation in next 30 days
EPSS Percentile
75.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0178 is in the 58th percentile among its peer group of 51,466 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
pippatch availablevia ghsa
Product: colanderFixed in: 1.7.0

Vendor Advisories (1)

pipGHSA-rv95-4wxj-6fqqhigh

Pylons Colander Denial of Service vulnerability

Feb 7, 2019

References

github.com / Pylons/colander/issues/290
ExploitIssue TrackingThird Party Advisory
github.com / Pylons/colander/pull/323
PatchThird Party Advisory