SB2026091416 - Multiple vulnerabilities in IBM webMethods Integration
Published: September 14, 2026
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 5 vulnerabilities.
1) Insufficient verification of data authenticity (CVE-ID: CVE-2026-12817)
CWE-ID: CWE-345 - Insufficient Verification of Data Authenticity
CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to tamper with decrypted OpenPGP data.
The vulnerability exists due to improper authentication tag validation in OpenPGP AEAD decryption when processing chunk-aligned data. A remote attacker can supply crafted encrypted data to tamper with decrypted OpenPGP data.
2) Observable discrepancy (CVE-ID: CVE-2026-59640)
CWE-ID: CWE-203 - Observable discrepancy
CVSSv4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to recover information about encrypted OpenPGP data.
The vulnerability exists due to an oracle exposure in OpenPGP CFB quick-check processing when handling symmetric and session-key paths. A remote attacker can submit crafted encrypted data to recover information about encrypted OpenPGP data.
3) Protection mechanism failure (CVE-ID: CVE-2026-59643)
CWE-ID: CWE-693 - Protection Mechanism Failure
CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to bypass OpenPGP inline-signature policy enforcement.
The vulnerability exists due to improper handling of policy failures in OpenPGP inline-signature verification when processing policy validation results. A remote attacker can supply crafted signed data to bypass OpenPGP inline-signature policy enforcement.
4) Resource exhaustion (CVE-ID: CVE-2026-59648)
CWE-ID: CWE-400 - Resource exhaustion
CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to uncontrolled resource consumption in OpenPGP Argon2 S2K processing when honoring attacker-chosen memory and passes. A remote attacker can supply crafted OpenPGP data to cause a denial of service.
5) Uncontrolled Memory Allocation (CVE-ID: CVE-2026-59649)
CWE-ID: CWE-789 - Uncontrolled Memory Allocation
CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to uncontrolled memory allocation in OpenPGP user-attribute subpacket parsing when processing a length bounded only by JVM max memory. A remote attacker can supply a crafted subpacket to cause a denial of service.
Remediation
Install update from vendor's website.