Is CVE-2022-27781 in the CISA KEV catalog?

No. CVE-2022-27781 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2022-27781?

CVE-2022-27781 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2022-27781?

CVE-2022-27781 has an EPSS score of 2.43% (82th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2022-27781?

Upgrade curl on debian 11 to 7.74.0-1.3+deb11u2 or later. Fixes are available for 7 affected products.

CVE & CISA-KEV Catalog

CVE-2022-27781

HIGHEPSS 82th pctl

7.5

CVSS v3

NVD

Description

libcurl provides the `CURLOPT_CERTINFO` option to allow applications torequest details to be returned about a server's certificate chain.Due to an erroneous function, a malicious server could make libcurl built withNSS get stuck in a never-ending busy-loop when trying to retrieve thatinformation.

CWE-400Resource Exhaustion CWE-835

How to fix

Remediation Available

curlDebian

Fixed in:7.74.0-1.3+deb11u2CVE-2022-27781

Fixed in:7.83.1-1CVE-2022-27781

curlUbuntu

Fixed in:7.35.0-1ubuntu2.20+esm11USN-5499-1

Fixed in:7.47.0-1ubuntu2.19+esm4USN-5499-1

Fixed in:7.58.0-2ubuntu3.18USN-5412-1

Fixed in:7.68.0-1ubuntu2.11USN-5412-1

Fixed in:7.81.0-1ubuntu1.2USN-5412-1

libcurl3Ubuntu

Fixed in:7.35.0-1ubuntu2.20+esm11USN-5499-1

Fixed in:7.47.0-1ubuntu2.19+esm4USN-5499-1

libcurl3-gnutlsUbuntu

Fixed in:7.35.0-1ubuntu2.20+esm11USN-5499-1

Fixed in:7.47.0-1ubuntu2.19+esm4USN-5499-1

Fixed in:7.58.0-2ubuntu3.18USN-5412-1

Fixed in:7.68.0-1ubuntu2.11USN-5412-1

Fixed in:7.81.0-1ubuntu1.2USN-5412-1

libcurl3-nssUbuntu

Fixed in:7.35.0-1ubuntu2.20+esm11USN-5499-1

Fixed in:7.47.0-1ubuntu2.19+esm4USN-5499-1

Fixed in:7.58.0-2ubuntu3.18USN-5412-1

Fixed in:7.68.0-1ubuntu2.11USN-5412-1

Fixed in:7.81.0-1ubuntu1.2USN-5412-1

libcurl4Ubuntu

Fixed in:7.58.0-2ubuntu3.18USN-5412-1

Fixed in:7.68.0-1ubuntu2.11USN-5412-1

Fixed in:7.81.0-1ubuntu1.2USN-5412-1

UniversalForwarderWindows application

Affected:8.2.0 8.2.12Fixed in:8.2.12Splunk, Inc.

Affected:9.0.0 9.0.6Fixed in:9.0.6Splunk, Inc.

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

2.43%probability of exploitation in 30 days

82ndpercentile

Elevated risk: more likely to be exploited than 82% of all known CVEs.

References

Exploit1

hackerone.com

Third-Party Advisory4

Related Vulnerabilities

Other CWE-400 (Resource Exhaustion) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-44487	High	7.5	100%	KEV	Fix
CVE-2021-44228	Critical	10.0	100%	KEV + Ransom	Fix
CVE-2011-3192	High	7.8	99%	-	Fix
CVE-2019-11478	Medium	5.3	95%	-	Fix
CVE-2024-25617	Medium	5.3	89%	-	Fix
CVE-2018-1000115	High	7.5	89%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-05-27.