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CVE-2021-29506

22
FAUCET Score

CVE-2021-29506 is a regular expression injection vulnerability affecting GraphHopper, an open-source Java routing engine, in versions 2.0 through 2.3. This flaw can lead to a Denial of Service (DoS) condition. With a CVSS score of 6.5 (Medium), it can be exploited remotely with low attack complexity and requires low privileges, resulting in high availability impact. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
>= 2.0, < 2.4CPE matchmatch criteria
cpe:2.3:a:graphhopper:graphhopper:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.5MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.40%
Probability of exploitation in next 30 days
EPSS Percentile
69.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0140 is in the 83rd percentile among its peer group of 21,974 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 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 (2)

github_advisorypatch availablevia nvd_reference
View patch
mavenpatch availablevia ghsa
Product: com.graphhopper:graphhopper-navFixed in: 2.4

Vendor Advisories (1)

mavenGHSA-hf44-3mx6-vhhwmedium

Navigate endpoint is vulnerable to regex injection that may lead to Denial of Service.

May 19, 2021

References

github.com / graphhopper/graphhopper/commit/eb189be1fa7443ebf4ae881e737a18f818c95f41
PatchThird Party Advisory
github.com / graphhopper/graphhopper/pull/2304
PatchThird Party Advisory
github.com / graphhopper/graphhopper/security/advisories/GHSA-hf44-3mx6-vhhw
Third Party Advisory