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CVE-2023-37475

23
FAUCET Score

CVE-2023-37475 is a denial-of-service vulnerability affecting the Hamba avro Go language encoder/decoder, specifically the avro_project avro product. A specially crafted string passed to the Unmarshal() function can trigger an out-of-memory error, causing the application to crash. This high-severity vulnerability (CVSS 7.5) has a low attack complexity and requires no user interaction, allowing unauthenticated attackers to achieve a complete denial of service. While a fix is available in version 2.13.0, there are currently no known workarounds, active exploits, or public exploit code, and it has received minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 2.13.0CPE matchmatch criteria
cpe:2.3:a:avro_project:avro:*:*:*:*:*:go:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/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
3.1

Exploit Intelligence

EPSS Score
0.96%
Probability of exploitation in next 30 days
EPSS Percentile
57.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0096 is in the 32nd percentile among its peer group of 51,485 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 (3)

github_advisorypatch availablevia nvd_reference
View patch
gopatch availablevia ghsa
Product: github.com/hamba/avroFixed in: 2.13.0
gopatch availablevia ghsa
Product: github.com/hamba/avro/v2Fixed in: 2.13.0

Vendor Advisories (1)

goGHSA-9x44-9pgq-cf45high

avro vulnerable to denial of service via attacker-controlled parameter

Jul 17, 2023

References

github.com / hamba/avro/commit/b4a402f41cf44b6094b5131286830ba9bb1eb290
Patch
github.com / hamba/avro/security/advisories/GHSA-9x44-9pgq-cf45
ExploitVendor Advisory