Improper Validation of Integrity Check Value Affecting org.bouncycastle:bc-fips package, versions [,1.0.2.7)[2.0.0, 2.0.2)[2.1.0, 2.1.3)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published5 Aug 2026
- disclosed3 Aug 2026
- creditUnknown
Introduced: 3 Aug 2026
NewCVE-2026-58061 (opens in a new tab)How to fix?
Upgrade org.bouncycastle:bc-fips to version 1.0.2.7, 2.0.2, 2.1.3 or higher.
Overview
Affected versions of this package are vulnerable to Improper Validation of Integrity Check Value that leads to information exposure in the processPacket() method of CCMBlockCipher, with equivalent paths in KCCMBlockCipher and KGCMBlockCipher, which decrypt directly into the caller's output buffer and leave the unverified plaintext there when the authentication tag check fails. An attacker can recover AES-CTR(key, nonce) XOR ciphertext, effectively reducing CCM to unauthenticated CTR, by submitting forged ciphertexts and reading the output buffer on the failure path. This requires the attacker to submit ciphertexts and observe the caller's output buffer after a failed verification, for example through pooled-buffer reuse, logging, or memory inspection.