CVE-2026-71543

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4%, top 66% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Trending — 3 sources updated this week
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.5Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

OpenBao is an open source identity-based secrets management system. Prior to 2.6.0, templated ACL, PKI, and SSH policies could substitute attacker-controlled identity data without rejecting syntax-significant characters. In ACL templated policies, asterisks, plus signs, and slashes could alter path matching. In PKI allowed_uri_sans_template and allowed_domains policies, an asterisk could broaden certificate issuance to unauthorized domains. In SSH allowed_users and allowed_domains policies, a comma could add unauthorized principals. Exploitation requires a deployment to use templated policy data that users can freely modify; templates based on the randomly generated identity.entity.id value are not affected. This could allow privilege escalation, unauthorized access, and unauthorized certificate issuance. This issue is fixed in version 2.6.0.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
38(Track)
EG Risk 38/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity75% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
34%
KEV
Not listed

Published

September 21, 2026

Last Modified

September 24, 2026

Advisory Details (6)

Auto-updated Sep 21, 2026
Patch available. Sources: github, github_commit, github_pr.
github Patch Available

OpenBao's Templated Policies Allow Privilege Escalation via Wildcard Characters · Advisory · openbao/openbao · GitHub

https://github.com/openbao/openbao/security/advisories/GHSA-59w7-v8rr-pr4p
github_pr

Fix ACL templates allow wildcard chars in substitution (#3401)

Fix merged in openbao/openbao PR #3473 on 2026-07-13 — awaiting tagged release

https://github.com/openbao/openbao/pull/3473
github_pr

Fix ACL templates allow wildcard chars in substitution

Fix merged in openbao/openbao PR #3401 on 2026-07-10 — awaiting tagged release

https://github.com/openbao/openbao/pull/3401
github_commit

commit e516ce508e14 (openbao/openbao)

Fix landed in openbao/openbao commit e516ce508e14 — awaiting tagged release

https://github.com/openbao/openbao/commit/e516ce508e1481504cadbfbf62052364339093bc
github_commit

commit 2d4ebafec5c5 (openbao/openbao)

Fix landed in openbao/openbao commit 2d4ebafec5c5 — awaiting tagged release

https://github.com/openbao/openbao/commit/2d4ebafec5c524408b3d4ac1198df909cb7ac8c1
generic

vault/CHANGELOG.md at main · hashicorp/vault · GitHub

https://github.com/hashicorp/vault/blob/main/CHANGELOG.md#201

Vendor Advisories for CVE-2026-71543(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(1 across 1 ecosystem)
Go(1)
PackageVulnerable rangeFixed inDependents
github.com/openbao/openbao—0.0.0-20260710001938-2d4ebafec5c5—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 7× in last 7d / 7× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-09-24 19:58 UTCEG score recompute
  2. 2026-09-23 22:05 UTCEG score recompute
  3. 2026-09-23 17:54 UTCEPSS rescore
  4. 2026-09-23 00:12 UTCEG score recompute
  5. 2026-09-21 15:22 UTCEG score recompute
  6. 2026-09-21 15:15 UTCEG score recompute
  7. 2026-09-21 15:15 UTCMITRE cvelistV5first tracked

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-71543?
CVE-2026-71543 is a high vulnerability published on September 21, 2026. OpenBao is an open source identity-based secrets management system. Prior to 2.6.0, templated ACL, PKI, and SSH policies could substitute attacker-controlled identity data without rejecting syntax-significant characters. In ACL templated policies, asterisks, plus signs, and slashes could alter path…
When was CVE-2026-71543 disclosed?
CVE-2026-71543 was first published in the National Vulnerability Database on September 21, 2026, with the most recent update on September 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-71543 actively exploited?
CVE-2026-71543 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 66.3% of all scored CVEs.
What is the CVSS score of CVE-2026-71543?
CVE-2026-71543 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-71543?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-71543, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-71543

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