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CVE-2020-1964

31
FAUCET Score

CVE-2020-1964 is a critical remote code execution vulnerability affecting Apache Heron versions 0.20.2-incubating, 0.20.1-incubating, and v-0.20.0-incubating. The flaw stems from the YAML parser not preventing the instantiation of arbitrary types, leading to deserialization of untrusted data. With a CVSS score of 9.8, this vulnerability is easily exploitable over the network with low complexity, requiring no user interaction, and can result in complete compromise of confidentiality, integrity, and availability. While not listed in CISA's KEV catalog and lacking public exploit code in Metasploit, Nuclei, or ExploitDB, the vulnerability has garnered significant community discussion, indicating potential interest and awareness among researchers.

Impacted Technologies

VendorProductVersion(s)CPE
0.20.0-incubatingCPE matchmatch criteria
cpe:2.3:a:apache:heron:0.20.0-incubating:*:*:*:*:*:*:*
0.20.1-incubatingCPE matchmatch criteria
cpe:2.3:a:apache:heron:0.20.1-incubating:-:*:*:*:*:*:*
0.20.2-incubatingCPE matchmatch criteria
cpe:2.3:a:apache:heron:0.20.2-incubating:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
4.81%
Probability of exploitation in next 30 days
EPSS Percentile
91.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0481 is in the 85th percentile among its peer group of 36,833 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

mavenpatch availablevia ghsa
Product: org.apache.heron:heron-simulatorFixed in: 0.20.3-incubating

Vendor Advisories (1)

mavenGHSA-hjgm-f7vx-m5g7high

Deserialization of Untrusted Data in Apache Heron

Jan 6, 2022

References

lists.apache.org / thread.html/r16dd39f4180e4443ef4ca774a3a5a3d7ac69f91812c183ed2a99e959%40%3Cdev.heron.apache.org%3E
Mailing ListVendor Advisory
lists.apache.org / thread.html/rd43ae18588fd7bdb375be63bc95a651aab319ced6306759e1237ce67%40%3Cdev.ignite.apache.org%3E
lists.apache.org / thread.html/re7b43cf8333ee30b6589e465f72a6ed4a082222612d1a0fdd30beb94%40%3Cdev.ignite.apache.org%3E
lists.apache.org / thread.html/re7b43cf8333ee30b6589e465f72a6ed4a082222612d1a0fdd30beb94%40%3Cuser.ignite.apache.org%3E
lists.apache.org / thread.html/rf032a13a4711f88c0a2c0734eecbee1026cc1b6cde27d16a653f8755%40%3Cdev.ignite.apache.org%3E