OPENSUSE-SU-2026:21538-1: bouncycastle security update

OPENSUSE-SU-2026:21538-1, released August 6, 2026, fixes 32 CVEs in bouncycastle (version 1.85-160000.1.1). None of them is reported as exploited. Patch Radar priority: Urgent.

Urgent

CVEs closed

3 rated Critical

Exploited

None reported

Highest CVSS

9.1

Base score, 0 to 10

Highest EPSS

0.0062

49th percentile

Priority of the 32 CVEs

Patch now 0
                                Urgent 3
                                High 21
                                Routine 8

Fixed package versions

Product	Release	Fixed in
bouncycastle	opensuse-leap 16.0	1.85-160000.1.1

CVEs this fix closes

Priority	CVE	Title	CVSS	EPSS	Exploitation
Urgent	CVE-2026-8763	bouncycastle: Name Constraints bypass via trailing dot in rfc822Name and URI (bsc#1272700).	9.1	0.0043	None reported
Urgent	CVE-2026-58062	bouncycastle: Stapled OCSP response accepted without binding to the checked certificate (bsc#1272716).	9.1	0.0036	None reported
Urgent	CVE-2026-59650	bouncycastle: MTI/A0 DH agreement exponentiates unvalidated peer value (bsc#1272730).	9.1	0.0034	None reported
High	CVE-2026-13586	bouncycastle: PKCS#12 MAC and bag-decryption KDF iteration-count bound (bsc#1272710).	7.5	0.0062	None reported
High	CVE-2026-58060	bouncycastle: HSS public-key level count unbounded, enabling huge allocation on verify (bsc#1272714).	7.5	0.0062	None reported
High	CVE-2026-12852	bouncycastle: MLS wire decoder allocates attacker-declared opaque length before bounds check (bsc#1272707).	7.5	0.0049	None reported
High	CVE-2026-13506	bouncycastle: Lazy ASN.1 sequence forcing resets nesting-depth guard (bsc#1272709).	7.5	0.0049	None reported
High	CVE-2026-14682	bouncycastle: Possible OOM from unbounded up-front allocation on a definite-length read (bsc#1272711).	7.5	0.0049	None reported
High	CVE-2026-58059	bouncycastle: Quadratic-time escaping when stringifying X.500 distinguished names (bsc#1272713).	7.5	0.0049	None reported
High	CVE-2026-59644	bouncycastle: MLS hash-ratchet honours arbitrary 32-bit generation counter from sender (bsc#1272724).	7.5	0.0049	None reported
High	CVE-2026-59649	bouncycastle: OpenPGP user-attribute subpacket length bounded only by JVM max memory (bsc#1272729).	7.5	0.0049	None reported
High	CVE-2026-59646	bouncycastle: DTLS handshake reassembler allocates buffer from unchecked 24-bit length (bsc#1272726).	7.5	0.0047	None reported
High	CVE-2026-59645	bouncycastle: OER parser recurses without depth limit on self-referential IEEE 1609.2 schema (bsc#1272725).	7.5	0.0041	None reported
High	CVE-2026-15055	bouncycastle: PKCS#8 / PBES2 decryptors honour unbounded KDF cost from input (bsc#1272712).	8.2	0.0034	None reported
High	CVE-2026-59642	bouncycastle: CMS AuthenticatedData content not bound to MAC when authAttrs present (bsc#1272722).	7.5	0.0030	None reported
High	CVE-2026-12185	bouncycastle: BKS/UBER keystore allocates from untrusted lengths before integrity check (bsc#1272701).	8.6	0.0029	None reported
High	CVE-2026-58061	bouncycastle: CCM-family modes write plaintext to caller buffer before tag check (bsc#1272715).	7.5	0.0028	None reported
High	CVE-2026-59639	bouncycastle: CMS verifySignatures returns true for SignedData with zero signers (bsc#1272719).	7.5	0.0024	None reported
High	CVE-2026-59643	bouncycastle: OpenPGP inline-signature policy failures silently ignored (bsc#1272723).	7.5	0.0024	None reported
High	CVE-2026-12803	bouncycastle: KCCMBlockCipher MAC does not bind nonce when AAD is absent (bsc#1272703).	7.5	0.0024	None reported
High	CVE-2026-59651	bouncycastle: BKS keystore accepts legacy version with 16-bit integrity MAC key (bsc#1272731).	7.5	0.0020	None reported
High	CVE-2026-12802	bouncycastle: CMS AuthEnvelopedData fails to enforce tag-length on decryption (bsc#1272702).	7.5	0.0020	None reported
High	CVE-2026-12816	bouncycastle: IESEngine stream-mode MAC forgery via length-dependent KDF split (bsc#1272704).	7.5	0.0018	None reported
High	CVE-2026-12817	bouncycastle: OpenPGP AEAD decryption skips final tag on chunk-aligned data (bsc#1272705).	8.6	0.0017	None reported
Routine	CVE-2026-58063	bouncycastle: BCFKS keystore load honours unbounded KDF cost from untrusted file (bsc#1272717).	5.3	0.0042	None reported

Also fixes CVE-2026-8763

SUSE-SU-2026:3559-1
bouncycastle on sles 15.6, sles 15.7
SUSE-SU-2026:23150-1
bouncycastle on sles 16.0
ALAS2023-2026-2153
bouncycastle, bouncycastle-javadoc, bouncycastle-mail and 4 more on amzn 2023
DEBIAN-CVE-2026-8763
bouncycastle on Debian 14

Vendor advisory

https://osv.dev/vulnerability/openSUSE-SU-2026:21538-1

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