CVE-2024-28716Public exploitNetwork attack vector

API interruption via catastrophic regex backtracking

Published Apr 30, 2024 · Updated Aug 2, 2024

Regular expression denial of service in OpenStack Solum yoga-eom allows remote attackers to interrupt the API via a crafted repository URL. The URL parser in solum/api/handlers/common.py applies overlapping greedy groups to repository input, causing catastrophic backtracking on long nonmatching strings. The documented deployment authenticates the API through Keystone, while CISA-ADP assesses the flaw as requiring no privileges or user interaction.

CVSS severity7.5
High
EPSS probability1.36%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Regular expression denial of service in OpenStack Solum yoga-eom allows remote attackers to interrupt the API via a crafted repository URL. The URL parser in solum/api/handlers/common.py applies overlapping greedy groups to repository input, causing catastrophic backtracking on long nonmatching strings. The documented deployment authenticates the API through Keystone, while CISA-ADP assesses the flaw as requiring no privileges or user interaction.

The record

CVE
CVE-2024-28716
Published
Apr 30, 2024
Updated
Aug 2, 2024
Vendor
OpenStack
Product
Solum
Classifications
CWE-1333, CAPEC-492, T1499.003
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 30, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 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=-

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

OpenStack · Solumversion=-

Published CVSS scores

7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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.

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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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-1333Inefficient Regular Expression Complexity
CAPEC-492Regular Expression Exponential Blowup
T1499.003Application Exhaustion Flood

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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