CVE-2021-29506Network attack vector

Authenticated service interruption via regex profile parsing

Published May 13, 2021 · Updated Aug 3, 2024

Regular expression injection in GraphHopper 2.0 through 2.3 allows remote authenticated users to interrupt the routing service. NavigateResource.getPointsFromRequest inserts the attacker-controlled profile path segment into String.replaceFirst as a regular expression. A low-privileged account and the navigation module are required; pathological matching can consume resources until the service is unavailable.

CVSS severity6.5
Medium
EPSS probability1.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Regular expression injection in GraphHopper 2.0 through 2.3 allows remote authenticated users to interrupt the routing service. NavigateResource.getPointsFromRequest inserts the attacker-controlled profile path segment into String.replaceFirst as a regular expression. A low-privileged account and the navigation module are required; pathological matching can consume resources until the service is unavailable.

The record

CVE
CVE-2021-29506
Published
May 13, 2021
Updated
Aug 3, 2024
Vendor
GraphHopper
Product
GraphHopper
Classifications
CWE-400, T1499.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 13, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 2.0, < 2.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

GraphHopper · GraphHopperversion=>= 2.0, < 2.4

Published CVSS scores

6.5GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
4.0NIST NVDAV:N/AC:L/Au:S/C:N/I:N/A:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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