VulnTideExploited vulnerabilities, by vendor. Data as of .
Not in CISA KEVPublished CVSS 8.7 highEPSS 0.3% probability of exploitation in 30 daysFound by AI: Anthropic (Claude)
Legion of the Bouncy Castle

CVE-2026-59642: CMS AuthenticatedData content not bound to MAC when authAttrs present

Is it exploited?

Not on CISA's list. CISA has not added it to the Known Exploited Vulnerabilities catalog as of . If CISA adds it, this page shows it as known exploited.

How likely is exploitation in the next 30 days?
0.3%

EPSS score, percentile 23 of all scored records. A probability estimated by FIRST, not a report of exploitation.

How severe?
8.7 High

CVSS v4.0 base score, given by the CNA

What should I do?

CISA has set no required action, because the vulnerability is not in KEV.

Advisories and patches (2)

Which versions are affected?

Affected

  • before 1.85
  • from 2.73.0 to before 2.73.12
  • from 1.0.0 to before 1.0.12
  • from 2.0.0 to before 2.0.12
  • from 2.1.0 to before 2.1.12

Versions by product

Source: CISA KEV 2026.10.29, as of ; FIRST EPSS, as of ; CVE List, as of . About the data.

What to do

Advisories and patches

This summary is based on the CVE record as of . Check the vendor's advisory before you act: affected versions and fixes can change.

Affected products and versions

As listed in the CVE record.

Legion of the Bouncy Castle Inc. BC-JAVA
StatusVersions
Affectedbefore 1.85

Versions not listed are: unaffected.

Legion of the Bouncy Castle Inc. BC-LTS-JAVA
StatusVersions
Affectedfrom 2.73.0 to before 2.73.12

Versions not listed are: unaffected.

Legion of the Bouncy Castle Inc. BC-FJA
StatusVersions
Affectedfrom 1.0.0 to before 1.0.12
Affectedfrom 2.0.0 to before 2.0.12
Affectedfrom 2.1.0 to before 2.1.12

Versions not listed are: unaffected.

Source: CVE List, as of . About the data.

About this vulnerability

In Bouncy Castle for Java before 1.85, CMS AuthenticatedData content not bound to MAC when authAttrs present. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS (BC-FJA) before bcpkix-fips 1.0.12 (1.0.X series), 2.0.12 (2.0.X series) and 2.1.12 (2.1.X series).

Summary: CVE record, as of .

  • CISA has not added CVE-2026-59642 to its Known Exploited Vulnerabilities (KEV) catalog, as of 29 Oct 2026.
  • The CVE record was published on 3 Aug 2026.
  • The CVE record carries a CVSS v4.0 base score of 8.7 (High), given by its CNA.
  • FIRST's EPSS model puts the probability of exploitation in the next 30 days at 0.3% (percentile 23), as of 29 Oct 2026. EPSS is a statistical estimate, not a report of exploitation.
  • CISA's SSVC assessment in the CVE record: exploitation none, automatable yes, technical impact partial.
  • The credits in the CVE record name Anthropic (Claude) as finder.

Source: CISA KEV 2026.10.29, as of ; CVE List, as of ; FIRST EPSS, as of . About the data.

Description

CMS AuthenticatedData content not bound to MAC when authAttrs present

In Bouncy Castle for Java before 1.85, CMS AuthenticatedData content not bound to MAC when authAttrs present. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS (BC-FJA) before bcpkix-fips 1.0.12 (1.0.X series), 2.0.12 (2.0.X series) and 2.1.12 (2.1.X series).

Source: CVE List, as of . About the data.

Weakness

CWE-354
  • CWE-354: Improper Validation of Integrity Check Value

CWE and CAPEC are maintained by MITRE; the entries are those named in the CVE record.

Timeline

DateEvent
CVE record published