ZDF
Sign inSign up

Vulnerabilities

Vulnerability · CVE-2025-59043

OpenBao is an open source identity-based secrets management system.

Published Oct 17, 2025 · catalog updated Oct 17, 2025 · OpenBao is an open

Last checked Oct 26, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2025-59043. EPSS is 0.69%. Act only if a listed version of OpenBao is an open is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (OpenBao is an open).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
High7.5
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.69%
Remediation
Version ranges on file
Affected products
vendor openbao openbao < 2.4.1

OpenBao is an open source identity-based secrets management system. In OpenBao versions prior to 2.4.1, JSON objects after decoding may use significantly more memory than their serialized version. It is possible to craft a JSON payload to maximize the factor between serialized memory usage and deserialized memory usage, similar to a zip bomb, with factors reaching approximately 35. This can be used to circumvent the max_request_size configuration parameter which is intended to protect against denial of service attacks. The request body is parsed into a map very early in the request handling ch

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor openbao openbao < 2.4.1< 2.4.1

How to fix CVE-2025-59043

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-59043. EPSS is 0.69%. Act only if a listed version of OpenBao is an open is installed.

Which versions are affected?

Compare what you have installed with openbao openbao < 2.4.1 < 2.4.1. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.69%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 17, 2025 · EUVD

    Detected

    OpenBao is an open source identity-based secrets management system. In OpenBao versions prior to 2.4.1, JSON objects after decoding may use significantly more memory than their serialized version. It is possible to craft a JSON payload to maximize the factor between serialized memory usage and deserialized memory usage, similar to a zip bomb, with factors reaching approximately 35. This can be use

  2. Oct 17, 2025 · EUVD

    Updated

    OpenBao is an open source identity-based secrets management system. In OpenBao versions prior to 2.4.1, JSON objects after decoding may use significantly more memory than their serialized version. It is possible to craft a JSON payload to maximize the factor between serialized memory usage and deserialized memory usage, similar to a zip bomb, with factors reaching approximately 35. This can be use

Sources

  • CVE.orgVulnerability recordCVE-2025-59043

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-59043

    30-day exploitation probability 0.69%

    first.org
  • EUVDVulnerability recordEUVD-2025-34895

    OpenBao is an open source identity-based secrets management system. In OpenBao versions prior to 2.4.1, JSON objects after decoding may use significantly more memory than their serialized version. It is possible to craft a JSON payload to maximize the factor between serialized me

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Oct 26, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSOct 26, 2026
  • CVE.orgOct 26, 2026
  • EUVDOct 26, 2026