Vulnerability-Lookup

OPENSUSE-SU-2026:20566-1

Vulnerability from csaf_opensuse - Published: 2026-04-20 08:27 - Updated: 2026-09-17 17:30

Summary

Security update for Botan

Severity

Moderate

Notes

Title of the patch: Security update for Botan

Description of the patch: This update for Botan fixes the following issue: - CVE-2026-32884: Certificate validation bypass due to mixed-case Common Name in X.509 certificates (bsc#1261993).

Patchnames: openSUSE-Leap-16.0-590

CVE-2026-32884

5.9 (Medium)


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

Affected products

Recommended 17 products

Product	Version	Remediation
Unresolved product id: openSUSE Leap 16.0:Botan-0:3.7.1-160000.4.1.aarch64	—	Vendor Fix
Unresolved product id: openSUSE Leap 16.0:Botan-0:3.7.1-160000.4.1.ppc64le	—	Vendor Fix
Unresolved product id: openSUSE Leap 16.0:Botan-0:3.7.1-160000.4.1.s390x	—	Vendor Fix
Unresolved product id: openSUSE Leap 16.0:Botan-0:3.7.1-160000.4.1.x86_64	—	Vendor Fix
Unresolved product id: openSUSE Leap 16.0:Botan-doc-0:3.7.1-160000.4.1.noarch	—	Vendor Fix
Unresolved product id: openSUSE Leap 16.0:libbotan-3-7-0:3.7.1-160000.4.1.aarch64	—	Vendor Fix
Unresolved product id: openSUSE Leap 16.0:libbotan-3-7-0:3.7.1-160000.4.1.ppc64le	—	Vendor Fix
Unresolved product id: openSUSE Leap 16.0:libbotan-3-7-0:3.7.1-160000.4.1.s390x	—	Vendor Fix
Unresolved product id: openSUSE Leap 16.0:libbotan-3-7-0:3.7.1-160000.4.1.x86_64	—	Vendor Fix
Unresolved product id: openSUSE Leap 16.0:libbotan-devel-0:3.7.1-160000.4.1.aarch64	—	Vendor Fix
Unresolved product id: openSUSE Leap 16.0:libbotan-devel-0:3.7.1-160000.4.1.ppc64le	—	Vendor Fix
Unresolved product id: openSUSE Leap 16.0:libbotan-devel-0:3.7.1-160000.4.1.s390x	—	Vendor Fix
Unresolved product id: openSUSE Leap 16.0:libbotan-devel-0:3.7.1-160000.4.1.x86_64	—	Vendor Fix
Unresolved product id: openSUSE Leap 16.0:python3-botan-0:3.7.1-160000.4.1.aarch64	—	Vendor Fix
Unresolved product id: openSUSE Leap 16.0:python3-botan-0:3.7.1-160000.4.1.ppc64le	—	Vendor Fix
Unresolved product id: openSUSE Leap 16.0:python3-botan-0:3.7.1-160000.4.1.s390x	—	Vendor Fix
Unresolved product id: openSUSE Leap 16.0:python3-botan-0:3.7.1-160000.4.1.x86_64	—	Vendor Fix

Threats

Impact moderate

References

6 references

URL	Category
https://www.suse.com/support/security/rating/	external
https://ftp.suse.com/pub/projects/security/csaf/o…	self
https://bugzilla.suse.com/1261993	self
https://www.suse.com/security/cve/CVE-2026-32884/	self
https://www.suse.com/security/cve/CVE-2026-32884	external
https://bugzilla.suse.com/1261993	external

JSON

To clipboard

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CVE-2026-32884 (GCVE-0-2026-32884)

Vulnerability from cvelistv5 – Published: 2026-03-30 20:36 – Updated: 2026-03-31 18:53

Title

Botan: Case-Insensitive CN Values Bypass DNS excludedSubtrees Name Constraints (RFC 5280 Violation)

Summary

Botan is a C++ cryptography library. Prior to version 3.11.0, during processing of an X.509 certificate path using name constraints which restrict the set of allowable DNS names, if no subject alternative name is defined in the end-entity certificate Botan would check that the CN was allowed by the DNS name constraints, even though this check is technically not required by RFC 5280. However this check failed to account for the possibility of a mixed-case CN. Thus a certificate with CN=Sub.EVIL.COM and no subject alternative name would bypasses an excludedSubtrees constraint for evil.com because the comparison is case-sensitive. This issue has been patched in version 3.11.0.

Severity

5.9 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-03-31 18:50 UTC

CWE

CWE-295 - Improper Certificate Validation

Assigner

GitHub_M mitre root

References

1 reference

URL	Tags
https://github.com/randombit/botan/security/advis…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version
randombit	botan	Affected: < 3.11.0

Show details on NVD website

JSON

To clipboard

{
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            "baseScore": 5.9,
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Sightings

Author	Source	Type	Date	Other

Nomenclature

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Confirmed: The vulnerability has been validated from an analyst's perspective.
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Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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Action not permitted

OPENSUSE-SU-2026:20566-1

CVE-2026-32884 (GCVE-0-2026-32884)

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