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CVE-2023-38701

26
FAUCET Score

CVE-2023-38701 is a critical vulnerability affecting IOHK Hydra, the layer-two scalability solution for Cardano, prior to version 0.12.0. A flaw in the commit and initial validators allows an attacker to steal funds users attempt to commit into a Hydra head and prevent heads from opening. With a CVSS score of 9.1 (CRITICAL), this vulnerability has a network attack vector and low attack complexity, enabling unauthenticated attackers to achieve high integrity and availability impacts. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
< 0.12.0CPE matchmatch criteria
cpe:2.3:a:iohk:hydra:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.1CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.2
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.92%
Probability of exploitation in next 30 days
EPSS Percentile
56.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0092 is in the 41st percentile among its peer group of 36,835 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

Remediation records are not available for this CVE.

References

github.com / input-output-hk/hydra/blob/master/CHANGELOG.md
Release Notes
github.com / input-output-hk/hydra/blob/master/hydra-plutus/src/Hydra/Contract/Commit.hs
Product
github.com / input-output-hk/hydra/blob/master/hydra-plutus/src/Hydra/Contract/Util.hs
Product
github.com / input-output-hk/hydra/security/advisories/GHSA-6x9v-7x5r-w8w6
ExploitThird Party Advisory