{"schema_version":"1.7.2","id":"OESA-2026-4057","modified":"2026-09-25T01:27:46Z","published":"2026-09-25T01:27:46Z","upstream":["CVE-2026-53938","CVE-2026-53939"],"summary":"cjose security update","details":"Implementation of JOSE for C/C++\r\n\r\nSecurity Fix(es):\n\nOpenIDC/cjose is a C library implementing the Javascript Object Signing and Encryption (JOSE). Prior to version 0.6.2.5, cjose's JWE decryption path for the AES Key Wrap key-management algorithms (`alg` = `A128KW`, `A192KW`, `A256KW`) does not validate the length of the attacker-supplied `encrypted_key` (JWE Encrypted Key) before unwrapping it into a fixed-size, heap-allocated Content Encryption Key (CEK) buffer. A remote, unauthenticated attacker who can submit a crafted JWE to an application that decrypts it with an AES-KW symmetric key can trigger an out-of-bounds heap write, corrupting the heap. This leads at minimum to a crash (denial of service) and, depending on the heap layout and allocator, may be leverageable for further memory-corruption impact. `cjose_jwe_import()` / `cjose_jwe_decrypt()` are pre-authentication entry points: they parse and process fully attacker-controlled input. Upgrade to cjose 0.6.2.5 to receive a patch. If upgrading is not immediately possible, reject the AES Key Wrap algorithms (`A128KW`/`A192KW`/`A256KW`) for untrusted JWEs at the application layer.(CVE-2026-53938)\n\nOpenIDC/cjose is a C library implementing the Javascript Object Signing and Encryption (JOSE). In versions 0.6.1 through 0.6.2.5, when cjose encrypts a JWE using an AES-CBC-HMAC content-encryption algorithm (`A128CBC-HS256`, `A192CBC-HS384`, or `A256CBC-HS512`) together with any key-management algorithm that generates a fresh content-encryption key (CEK), the CEK is all zero bytes instead of being randomly generated. The resulting JWE is therefore encrypted and authenticated under a fixed, publicly known key, so anyone who obtains the JWE can recover the plaintext and forge or modify the content. This is fixed in version 0.6.2.6 by `_cjose_jwe_set_cek_aes_cbc()` generating the CEK from `RAND_bytes`. A regression test asserts that the `encrypted_key` differs across two encryptions for each AES-CBC-HMAC variant. Until upgrading, for data encrypted with cjose, three options are available. Use an AES-GCM `enc` (`A128GCM` / `A192GCM` / `A256GCM`) instead of an AES-CBC-HMAC `enc`,  use `alg=dir` with a caller-supplied CEK, or avoid using cjose for JWE encryption with the affected algorithm pair. These are mitigations for new ciphertexts only; data already encrypted under the zero key remains compromised and should be re-encrypted (and any secrets it contained rotated).(CVE-2026-53939)","affected":[{"package":{"ecosystem":"openEuler:24.03-LTS-SP3","name":"cjose","purl":"pkg:rpm/openEuler/cjose&distro=openEuler-24.03-LTS-SP3"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.6.2.7-1.oe2403sp3"}]}],"ecosystem_specific":{"aarch64":["cjose-0.6.2.7-1.oe2403sp3.aarch64.rpm","cjose-debuginfo-0.6.2.7-1.oe2403sp3.aarch64.rpm","cjose-debugsource-0.6.2.7-1.oe2403sp3.aarch64.rpm","cjose-devel-0.6.2.7-1.oe2403sp3.aarch64.rpm"],"src":["cjose-0.6.2.7-1.oe2403sp3.src.rpm"],"x86_64":["cjose-0.6.2.7-1.oe2403sp3.x86_64.rpm","cjose-debuginfo-0.6.2.7-1.oe2403sp3.x86_64.rpm","cjose-debugsource-0.6.2.7-1.oe2403sp3.x86_64.rpm","cjose-devel-0.6.2.7-1.oe2403sp3.x86_64.rpm"]}},{"package":{"ecosystem":"openEuler:24.03-LTS-SP4","name":"cjose","purl":"pkg:rpm/openEuler/cjose&distro=openEuler-24.03-LTS-SP4"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.6.2.7-1.oe2403sp4"}]}],"ecosystem_specific":{"aarch64":["cjose-0.6.2.7-1.oe2403sp4.aarch64.rpm","cjose-debuginfo-0.6.2.7-1.oe2403sp4.aarch64.rpm","cjose-debugsource-0.6.2.7-1.oe2403sp4.aarch64.rpm","cjose-devel-0.6.2.7-1.oe2403sp4.aarch64.rpm"],"src":["cjose-0.6.2.7-1.oe2403sp4.src.rpm"],"x86_64":["cjose-0.6.2.7-1.oe2403sp4.x86_64.rpm","cjose-debuginfo-0.6.2.7-1.oe2403sp4.x86_64.rpm","cjose-debugsource-0.6.2.7-1.oe2403sp4.x86_64.rpm","cjose-devel-0.6.2.7-1.oe2403sp4.x86_64.rpm"]}},{"package":{"ecosystem":"openEuler:20.03-LTS-SP4","name":"cjose","purl":"pkg:rpm/openEuler/cjose&distro=openEuler-20.03-LTS-SP4"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.6.2.7-1.oe2003sp4"}]}],"ecosystem_specific":{"aarch64":["cjose-0.6.2.7-1.oe2003sp4.aarch64.rpm","cjose-debuginfo-0.6.2.7-1.oe2003sp4.aarch64.rpm","cjose-debugsource-0.6.2.7-1.oe2003sp4.aarch64.rpm","cjose-devel-0.6.2.7-1.oe2003sp4.aarch64.rpm"],"src":["cjose-0.6.2.7-1.oe2003sp4.src.rpm"],"x86_64":["cjose-0.6.2.7-1.oe2003sp4.x86_64.rpm","cjose-debuginfo-0.6.2.7-1.oe2003sp4.x86_64.rpm","cjose-debugsource-0.6.2.7-1.oe2003sp4.x86_64.rpm","cjose-devel-0.6.2.7-1.oe2003sp4.x86_64.rpm"]}},{"package":{"ecosystem":"openEuler:22.03-LTS-SP4","name":"cjose","purl":"pkg:rpm/openEuler/cjose&distro=openEuler-22.03-LTS-SP4"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.6.2.7-1.oe2203sp4"}]}],"ecosystem_specific":{"aarch64":["cjose-0.6.2.7-1.oe2203sp4.aarch64.rpm","cjose-debuginfo-0.6.2.7-1.oe2203sp4.aarch64.rpm","cjose-debugsource-0.6.2.7-1.oe2203sp4.aarch64.rpm","cjose-devel-0.6.2.7-1.oe2203sp4.aarch64.rpm"],"src":["cjose-0.6.2.7-1.oe2203sp4.src.rpm"],"x86_64":["cjose-0.6.2.7-1.oe2203sp4.x86_64.rpm","cjose-debuginfo-0.6.2.7-1.oe2203sp4.x86_64.rpm","cjose-debugsource-0.6.2.7-1.oe2203sp4.x86_64.rpm","cjose-devel-0.6.2.7-1.oe2203sp4.x86_64.rpm"]}},{"package":{"ecosystem":"openEuler:24.03-LTS-SP1","name":"cjose","purl":"pkg:rpm/openEuler/cjose&distro=openEuler-24.03-LTS-SP1"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.6.2.7-1.oe2403sp1"}]}],"ecosystem_specific":{"aarch64":["cjose-0.6.2.7-1.oe2403sp1.aarch64.rpm","cjose-debuginfo-0.6.2.7-1.oe2403sp1.aarch64.rpm","cjose-debugsource-0.6.2.7-1.oe2403sp1.aarch64.rpm","cjose-devel-0.6.2.7-1.oe2403sp1.aarch64.rpm"],"src":["cjose-0.6.2.7-1.oe2403sp1.src.rpm"],"x86_64":["cjose-0.6.2.7-1.oe2403sp1.x86_64.rpm","cjose-debuginfo-0.6.2.7-1.oe2403sp1.x86_64.rpm","cjose-debugsource-0.6.2.7-1.oe2403sp1.x86_64.rpm","cjose-devel-0.6.2.7-1.oe2403sp1.x86_64.rpm"]}}],"references":[{"type":"ADVISORY","url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-4057"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-53938"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-53939"}],"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N"}],"database_specific":{"severity":"Critical"}}