Is CVE-2026-55770 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-55770 being exploited in the wild.

How severe is CVE-2026-55770?

Medium severity, with a CVSS score of 6.8, published 15 September 2026.

Which products and versions are affected?

github.com/openbao/openbao (Go) SEMVER:introduced=0,fixed=0.0.0-20260617104213-10b7825c714c,introduced=0.1.0, SEMVER:introduced=0.1.0,last_affected=2.5.4; OpenBao >= 0.1.0, <= 2.5.4.

Is there a fix for CVE-2026-55770?

Yes. github.com/openbao/openbao (Go): upgrade to 0.0.0-20260617104213-10b7825c714c or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-55770 attacked?

It is attacked over the network, in a hosted service.

Am I affected by CVE-2026-55770?

Check whether you run github.com/openbao/openbao (Go) or OpenBao at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-55770: OpenBao LDAP injection in ldaputil search filter construction

Q: Is there a fix for CVE-2026-55770?

Yes. github.com/openbao/openbao (Go): upgrade to 0.0.0-20260617104213-10b7825c714c or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

Q: How is CVE-2026-55770 attacked?

It is attacked over the network, in a hosted service.

Q: Am I affected by CVE-2026-55770?

Check whether you run github.com/openbao/openbao (Go) or OpenBao at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-55770 · Severity: medium · CVSS 6.8 · Published 2026-09-15

OpenBao, an open-source secrets management platform, is vulnerable to an authentication bypass when using LDAP. An attacker can craft a specially formatted username to manipulate the underlying directory search, potentially logging in as a different user, such as an administrator. This could allow unauthorized access to sensitive corporate secrets, credentials, and security policies.

Technologies: github.com/openbao/openbao (Go), OpenBao. Vendors: Go, OpenBao.

Quick answers

Is CVE-2026-55770 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-55770 being exploited in the wild.
How severe is CVE-2026-55770?: Medium severity, with a CVSS score of 6.8, published 15 September 2026.
Which products and versions are affected?: github.com/openbao/openbao (Go) SEMVER:introduced=0,fixed=0.0.0-20260617104213-10b7825c714c,introduced=0.1.0, SEMVER:introduced=0.1.0,last_affected=2.5.4; OpenBao >= 0.1.0, <= 2.5.4.
Is there a fix for CVE-2026-55770?: Yes. github.com/openbao/openbao (Go): upgrade to 0.0.0-20260617104213-10b7825c714c or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-55770 attacked?: It is attacked over the network, in a hosted service.
Am I affected by CVE-2026-55770?: Check whether you run github.com/openbao/openbao (Go) or OpenBao at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

github.com/openbao/openbao (Go): upgrade to 0.0.0-20260617104213-10b7825c714c or later
```
go get github.com/openbao/openbao@v0.0.0-20260617104213-10b7825c714c
```

Technical details

An LDAP injection vulnerability exists in OpenBao's `sdk/helper/ldaputil/client.go` because it uses `EscapeLDAPValue()` (RFC 4514) instead of `ldap.EscapeFilter()` (RFC 4515) when constructing search filters. While `EscapeLDAPValue()` is appropriate for Distinguished Names, it fails to neutralize characters like `*`, `(`, and `)` which are significant in LDAP filters. A remote attacker with the ability to provide a username at login can inject filter logic to alter the search query. This allows the attacker to match arbitrary user entries, potentially resulting in the issuance of a token bound to a high-privileged account if the LDAP server returns that entry first. The vulnerability is patched in version 2.5.5.

Affected products

OpenBao OpenBao >= 0.1.0, <= 2.5.4

Identifiers

CVE-2026-55770
GHSA-6mwx-4547-5vc9
GO-2026-5182

Timeline

2026-06-17: patched: Fix committed to main branch
2026-06-19: advisory: GitHub Advisory published

References

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