How severe is CVE-2022-43705?

CVE-2022-43705 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2022-43705 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (33rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-43705?

CVE-2022-43705 affects Botan Project Botan. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2022-43705?

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

When was CVE-2022-43705 published?

CVE-2022-43705 was published on 2022-11-27 and last updated on 2026-06-17.

CVE-2022-43705

CVE-2022-43705 is a critical-severity vulnerability in Botan Project Botan with a CVSS 3.x base score of 9.1. 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-295.

Key facts

Severity: Critical (CVSS 3.x base score 9.1)
EPSS exploit prediction: 0% (33rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-295
Affected product: Botan Project Botan
Published: 2022-11-27
Last modified: 2026-06-17

Description

In Botan before 2.19.3, it is possible to forge OCSP responses due to a certificate verification error. This issue was introduced in Botan 1.11.34 (November 2016).

Frequently asked questions

What is CVE-2022-43705?: In Botan before 2.19.3, it is possible to forge OCSP responses due to a certificate verification error. This issue was introduced in Botan 1.11.34 (November 2016).
How severe is CVE-2022-43705?: CVE-2022-43705 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2022-43705 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (33rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-43705?: CVE-2022-43705 affects Botan Project Botan. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2022-43705?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2022-43705 published?: CVE-2022-43705 was published on 2022-11-27 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:botan_project:botan:*:*:*:*:*:*:*:*

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