Vulnerability-Lookup

CNVD-2026-16031

Vulnerability from cnvd - Published: 2026-04-03

Title

OpenBao授权问题漏洞

Description

OpenBao是OpenBao开源的一个敏感数据管理软件。 OpenBao存在授权问题漏洞，该漏洞源于通过JWT/OIDC登录且角色callback_mode设置为direct时未提示用户确认，攻击者可利用该漏洞导致远程钓鱼攻击。

Severity

高

Patch Name

OpenBao授权问题漏洞的补丁

Patch Description

OpenBao是OpenBao开源的一个敏感数据管理软件。 OpenBao存在授权问题漏洞，该漏洞源于通过JWT/OIDC登录且角色callback_mode设置为direct时未提示用户确认，攻击者可利用该漏洞导致远程钓鱼攻击。目前，供应商发布了安全公告及相关补丁信息，修复了此漏洞。

Formal description

目前厂商已发布升级补丁以修复漏洞，补丁获取链接： https://github.com/openbao/openbao/releases

Reference

https://github.com/openbao/openbao/releases

Impacted products

Name
openbao openbao <2.5.2

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{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2026-33757",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2026-33757"
    }
  },
  "description": "OpenBao\u662fOpenBao\u5f00\u6e90\u7684\u4e00\u4e2a\u654f\u611f\u6570\u636e\u7ba1\u7406\u8f6f\u4ef6\u3002\n\nOpenBao\u5b58\u5728\u6388\u6743\u95ee\u9898\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u901a\u8fc7JWT/OIDC\u767b\u5f55\u4e14\u89d2\u8272callback_mode\u8bbe\u7f6e\u4e3adirect\u65f6\u672a\u63d0\u793a\u7528\u6237\u786e\u8ba4\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5bfc\u81f4\u8fdc\u7a0b\u9493\u9c7c\u653b\u51fb\u3002",
  "formalWay": "\u76ee\u524d\u5382\u5546\u5df2\u53d1\u5e03\u5347\u7ea7\u8865\u4e01\u4ee5\u4fee\u590d\u6f0f\u6d1e\uff0c\u8865\u4e01\u83b7\u53d6\u94fe\u63a5\uff1a\r\nhttps://github.com/openbao/openbao/releases",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2026-16031",
  "openTime": "2026-04-03",
  "patchDescription": "OpenBao\u662fOpenBao\u5f00\u6e90\u7684\u4e00\u4e2a\u654f\u611f\u6570\u636e\u7ba1\u7406\u8f6f\u4ef6\u3002\r\n\r\nOpenBao\u5b58\u5728\u6388\u6743\u95ee\u9898\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u901a\u8fc7JWT/OIDC\u767b\u5f55\u4e14\u89d2\u8272callback_mode\u8bbe\u7f6e\u4e3adirect\u65f6\u672a\u63d0\u793a\u7528\u6237\u786e\u8ba4\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5bfc\u81f4\u8fdc\u7a0b\u9493\u9c7c\u653b\u51fb\u3002\u76ee\u524d\uff0c\u4f9b\u5e94\u5546\u53d1\u5e03\u4e86\u5b89\u5168\u516c\u544a\u53ca\u76f8\u5173\u8865\u4e01\u4fe1\u606f\uff0c\u4fee\u590d\u4e86\u6b64\u6f0f\u6d1e\u3002",
  "patchName": "OpenBao\u6388\u6743\u95ee\u9898\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "openbao openbao \u003c2.5.2"
  },
  "referenceLink": "https://github.com/openbao/openbao/releases",
  "serverity": "\u9ad8",
  "submitTime": "2026-04-02",
  "title": "OpenBao\u6388\u6743\u95ee\u9898\u6f0f\u6d1e"
}

CVE-2026-33757 (GCVE-0-2026-33757)

Vulnerability from cvelistv5 – Published: 2026-03-27 14:10 – Updated: 2026-07-15 01:06

Title

OpenBao lacks user confirmation for OIDC direct callback mode

Summary

OpenBao is an open source identity-based secrets management system. Prior to version 2.5.2, OpenBao does not prompt for user confirmation when logging in via JWT/OIDC and a role with `callback_mode` set to `direct`. This allows an attacker to start an authentication request and perform "remote phishing" by having the victim visit the URL and automatically log-in to the session of the attacker. Despite being based on the authorization code flow, the `direct` mode calls back directly to the API and allows an attacker to poll for an OpenBao token until it is issued. Version 2.5.2 includes an additional confirmation screen for `direct` type logins that requires manual user interaction in order to finish the authentication. This issue can be worked around either by removing any roles with `callback_mode=direct` or enforcing confirmation for every session on the token issuer side for the Client ID used by OpenBao.

Severity

9.6 (Critical)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-03-31 00:00 UTC

CWE

CWE-384 - Session Fixation

Assigner

GitHub_M mitre root

References

6 references

URL	Tags
https://github.com/openbao/openbao/security/advis…	x_refsource_CONFIRM
https://github.com/openbao/openbao/commit/e321039…	x_refsource_MISC
https://datatracker.ietf.org/doc/html/rfc8628#sec…	x_refsource_MISC
https://access.redhat.com/security/cve/CVE-2026-33757	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2452269	issue-trackingx_refsource_REDHAT
https://security.access.redhat.com/data/csaf/v2/v…	x_sadp-csaf-vex

Impacted products

2 products

Vendor	Product	Version
openbao	openbao	Affected: < 2.5.2
Red Hat	Cryostat 4	cpe:/a:redhat:cryostat:4

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                "timestamp": "2026-03-31T00:00:00+00:00",
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            "packageName": "cryostat/cryostat-storage-rhel9",
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        "descriptions": [
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            "lang": "en",
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          }
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        "metrics": [
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                "namespace": "https://access.redhat.com/security/updates/classification/",
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}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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CNVD-2026-16031

CVE-2026-33757 (GCVE-0-2026-33757)

Tags

Sightings

Nomenclature

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