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CVE-2020-13955

18
FAUCET Score

CVE-2020-13955 in Apache Calcite allows for man-in-the-middle (MITM) attacks due to disabled hostname verification in the HttpUtils#getURLConnection method, potentially leading to information leakage when connecting to services like Druid and Splunk. This medium-severity vulnerability (CVSS 5.9) has a network attack vector and high confidentiality impact, but requires high attack complexity. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.26CPE matchmatch criteria
cpe:2.3:a:apache:calcite:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.9MEDIUM

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
2.2
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.14%
Probability of exploitation in next 30 days
EPSS Percentile
80.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0214 is in the 67th percentile among its peer group of 19,958 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

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

Remediation

Patch Available

Vendor Patches (3)

mavenpatch availablevia ghsa
Product: org.apache.calcite:calcite-coreFixed in: 1.26.0
mavenpatch availablevia ghsa
Product: org.apache.calcite:calcite-druidFixed in: 1.26.0
mavenpatch availablevia ghsa
Product: org.apache.calcite:calcite-splunkFixed in: 1.26.0

Vendor Advisories (1)

mavenGHSA-hxp5-8pgq-mgv9medium

Missing Authentication for Critical Function in Apache Calcite

Apr 22, 2021

References

lists.apache.org / thread.html/r0b0fbe2038388175951ce1028182d980f9e9a7328be13d52dab70bb3%40%3Cdev.calcite.apache.org%3E
Mailing ListThird Party Advisory