CVE-2026-32877

highpriority · track · 33EPSS 0.003 · 21 %ileEURUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.29% (21st) EPSS

CVSS 8.2 · high

Is it mine?

5 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · fstec_bdu · nvd

EPSS · scored 2026-10-27

Botan is a C++ cryptography library. From version 2.3.0 to before version 3.11.0, during SM2 decryption, the code that checked the authentication code value (C3) failed to check that the encoded value was of the expected length prior to comparison. An invalid ciphertext can cause a heap over-read of up to 31 bytes, resulting in a crash or potentially other undefined behavior. This issue has been patched in version 3.11.0.

cvss

Technical severity, 0–10. One row per scoring source.

8.2

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.18.2highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 4.2

v3.18.2highAV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:Hsecondary · FSTEC (BDU) RU

v3.18.2highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:Hsecondary · ENISA EU

v3.18.2highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:Hsecondary · security-advisories@github.comexploitability 3.9 · impact 4.2

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: yes · Technical Impact: partialcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-125USCWE-125US

affected products (5)

Products and version ranges known to be affected.

Randombit Botan2.3.0, → 3.11.0enisa_euvdEU
ООО «РусБИТех-Астра» Astra Linux Special Edition≤ 4.8fstec_bduRU
ООО «РусБИТех-Астра» Astra Linux Special Edition≤ 1.8fstec_bduRU
Сообщество свободного программного обеспечения botan2.3.0 → 3.10.0fstec_bduRU
botan project botan2.3.0 → 3.11.0nvdUScpe:2.3:a:botan_project:botan:*:*:*:*:*:*:*:*

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu nvd NVD CVE.org MITRE

published 2026-03-30modified 2026-06-17

references (4)

External citations — patches, advisories, analysis.

scry

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