How severe is CVE-2021-44139?

CVE-2021-44139 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2021-44139 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (93rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-44139?

CVE-2021-44139 affects Hashicorp Sentinel. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-44139?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-44139 published?

CVE-2021-44139 was published on 2022-03-23 and last updated on 2026-06-17.

CVE-2021-44139

CVE-2021-44139 is a high-severity vulnerability in Hashicorp Sentinel with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-918.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 6% (93rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-918
Affected product: Hashicorp Sentinel
Published: 2022-03-23
Last modified: 2026-06-17

Description

Sentinel 1.8.2 is vulnerable to Server-side request forgery (SSRF).

Frequently asked questions

What is CVE-2021-44139?: Sentinel 1.8.2 is vulnerable to Server-side request forgery (SSRF).
How severe is CVE-2021-44139?: CVE-2021-44139 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2021-44139 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (93rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-44139?: CVE-2021-44139 affects Hashicorp Sentinel. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-44139?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-44139 published?: CVE-2021-44139 was published on 2022-03-23 and last updated on 2026-06-17.

References

https://github.com/alibaba/Sentinel/issues/2451

Affected products (1)

cpe:2.3:a:hashicorp:sentinel:1.8.2:*:*:*:*:*:*:*

More vulnerabilities in Hashicorp Sentinel

CVE-2019-19879 — High (CVSS 7.5): HashiCorp Sentinel up to 0.10.1 incorrectly parsed negation in certain policy expressions. Fixed in 0.10.2.

All CVEs affecting Hashicorp Sentinel →

Other CWE-918 (Server-Side Request Forgery (SSRF)) vulnerabilities

CVE-2026-47938 — Critical (CVSS 10.0): Adobe Campaign Classic (ACC) versions 7.4.3 build 9394 and earlier are affected by a Server-Side Request Forgery (SSRF)…
CVE-2026-35431 — Critical (CVSS 10.0): Server-side request forgery (ssrf) in Microsoft Entra ID Entitlement Management allows an unauthorized attacker to…
CVE-2026-32186 — Critical (CVSS 10.0): Server-side request forgery (ssrf) in Microsoft Bing allows an unauthorized attacker to elevate privileges over a…
CVE-2026-33107 — Critical (CVSS 10.0): Server-side request forgery (ssrf) in Azure Databricks allows an unauthorized attacker to elevate privileges over a…
CVE-2026-32871 — Critical (CVSS 10.0): FastMCP is a Pythonic way to build MCP servers and clients. Prior to version 3.2.0, the OpenAPIProvider in FastMCP…
CVE-2026-32169 — Critical (CVSS 10.0): Server-side request forgery (ssrf) in Azure Cloud Shell allows an unauthorized attacker to elevate privileges over a…

Browse all CWE-918 (Server-Side Request Forgery (SSRF)) vulnerabilities →