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CVE-2022-26650

24
FAUCET Score

CVE-2022-26650 is a Regular Expression Denial of Service (ReDoS) vulnerability affecting Apache ShenYu versions 2.4.0 through 2.4.2. An unauthenticated attacker can provide malicious regular expressions and characters to the RegexPredicateJudge.java component, leading to resource exhaustion. This high-severity vulnerability (CVSS 7.5) has a low attack complexity and can result in a denial of service. There is currently no public exploit code, evidence of active exploitation, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
2.4.0CPE matchmatch criteria
cpe:2.3:a:apache:shenyu:2.4.0:*:*:*:*:*:*:*
2.4.1CPE matchmatch criteria
cpe:2.3:a:apache:shenyu:2.4.1:*:*:*:*:*:*:*
2.4.2CPE matchmatch criteria
cpe:2.3:a:apache:shenyu:2.4.2:*:*:*:*:*:*:*

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
2.49%
Probability of exploitation in next 30 days
EPSS Percentile
82.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0249 is in the 70th 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 (2)

mavenpatch availablevia ghsa
Product: org.apache.shenyu:shenyuFixed in: 2.4.3
mavenpatch availablevia ghsa
Product: org.apache.shenyu:shenyu-bootstrapFixed in: 2.4.3

Vendor Advisories (1)

mavenGHSA-cw56-j3fm-7w57high

Regular expression denial of service in Apache ShenYu

May 18, 2022

References

lists.apache.org / thread/8rp33m3nm4bwtx3qx76mqynth3t3d673
Mailing ListVendor Advisory
openwall.com / lists/oss-security/2022/05/17/3
Mailing ListPatchThird Party Advisory