CVE-2026-5052Disclosure(hashicorp / vault)

MEDIUMCVSS 8.6 · HIGH

Exploitation ongoing with high activity in latest observed window (1 mentions)

Immediate actions

Patch hashicorp vault systems immediately
Assume compromise if assets are exposed

Recommended action window: Immediate (within 24h)

NVD description

Vault’s PKI engine’s ACME validation did not reject local targets when issuing http-01 and tls-alpn-01 challenges. This may lead to these requests being sent to local network targets, potentially leading to information disclosure. Fixed in Vault Community Edition 2.0.0 and Vault Enterprise 2.0.0, 1.21.5, 1.20.10, and 1.19.16.

hashicorp CVEs Back to dashboard

4.0/ 10 priority

Sources & remediation

Vendor / third-party advisories

https://discuss.hashicorp.com/t/hcsec-2026-06-vault-vulnerable-to-server-side-request-forgery-in-acme-challenge-validation-via-attacker-controlled-dns/77343

Weakness type (CWE)

CWE-918

Priority

MEDIUM

Exploitation

ACTIVE

PoC

NONE

Patch

AVAILABLE

Momentum

STABLE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

vault

Threat summary

Active exploitation appears in 1 classified signals
Patch or workaround signal is available
3 mentions across 2 observed days
Momentum state: stable

What's happening

Active exploitation reported across 1 signal
Patch or workaround mentioned in 1 signal
Technical details provided in 2 signals
Disclosure: 2 classified signals
Peaked 1d ago at 2 mentions (2026-04-17); latest day: 1
3 total mentions across 2 days

Affected systems

Vendors

hashicorp

Products

vault

Deep dive

Activity timeline3 mentions / 2d

Signal classification2 categories

Disclosure

266.7%

Active Exploitation

133.3%

Referenced assets3 URLs

By indicator

Classification over time

Date	Total	Labels

2026-04-17	2	Disclosure2
2026-07-24	1	Active Exploitation1

Full discourse3 posts

Security Arsenal, LLC@SecurityAr5840976d
Active Exploitation
🔒 #CyberSecurity CISA KEV Alert: Check Point and SharePoint Flaws (CVE-2026-16232, CVE-2026-5052… "On July 22, 2026, the Cybersecurity and Infrastructure Security Agency (CISA) added two…" 🔗 https://securityarsenal.com/blog/cisa-kev-alert-check-point-and-sharepoint-flaws-cve-2026-16232-cve-2026-50522-detection-and-patching-guide #CyberSecurity #ThreatIntel #cve #zeroday #patchtuesday
Post summary
CISA alerts that Check Point and SharePoint vulnerabilities (CVE‑2026‑16232 & CVE‑2026‑5052) are actively exploited and links to a detection and patching guide.
0000070
20 followersView on X
CVE@CVEnew174d
Disclosure
CVE-2026-5052 Vault’s PKI engine’s ACME validation did not reject local targets when issuing http-01 and tls-alpn-01 challenges. This may lead to these requests being sent to local n… https://www.cve.org/CVERecord?id=CVE-2026-5052
Post summary
This is a disclosure of CVE‑2026‑5052, noting a local target resolution flaw in Vault’s PKI engine during ACME http‑01 and tls‑alpn‑01 challenges, with no PoC, exploit, or patch information provided.
0000060
57.2K followersView on X
Vulmon Vulnerability Feed@VulmonFeeds174d
Disclosure
CVE-2026-5052 Information Disclosure via ACME Validation in HashiCorp Vault PKI Engine https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-5052
Post summary
A new CVE (CVE-2026-5052) for an information disclosure issue in the ACME validation process of HashiCorp Vault PKI Engine has been announced, with a reference link for further details.
0000048
4.0K followersView on X

CPE platform detail2 entries

Part:

Vendor:

Product:

Version:

Target SW:

Target HW:

2 of 2 entries

Part	Vendor	Product	Version	Target SW	Target HW
App	hashicorp	vault	-	-	-
App	hashicorp	vault	-	-	-

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