{"id":"CVE-2026-53939","aliases":["ALSA-2026:80605","ALSA-2026:92145","ALSA-2026:92157","AZL-101096","CLSA-2026-1792632603","DEBIAN-CVE-2026-53939","EUVD-2026-74299","GHSA-f6wf-pqg3-6wqq","MGASA-2026-0496","OESA-2026-4057","RHSA-2026:80605","RHSA-2026:83224","RLSA-2026:80605","RLSA-2026:92145","RLSA-2026:92157","SUSE-SU-2026:23910-1","SUSE-SU-2026:4237-1","SUSE-SU-2026:4251-1","SUSE-SU-2026:4253-1","UBUNTU-CVE-2026-53939","openSUSE-SU-2026:11784-1","openSUSE-SU-2026:21944-1"],"status":"published","title":"OpenIDC/cjose uses all-zero Content Encryption Key for AES-CBC-HMAC JWE encryption","description":"OpenIDC/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).","severity":{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00245,"percentile":0.15895,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-321","CWE-330"],"published":"2026-09-08T23:36:13Z","modified":"2026-11-07T18:00:06Z","fixes":[{"ecosystem":"AlmaLinux:10","package":"cjose","fixed_in":["0.6.2.2-7.el10_2.2"],"sources":["osv"]},{"ecosystem":"AlmaLinux:10","package":"cjose-devel","fixed_in":["0.6.2.2-7.el10_2.2"],"sources":["osv"]},{"ecosystem":"AlmaLinux:9","package":"cjose","fixed_in":["0.6.1-17.el9_8.2"],"sources":["osv"]},{"ecosystem":"AlmaLinux:9","package":"cjose-devel","fixed_in":["0.6.1-17.el9_8.2"],"sources":["osv"]},{"ecosystem":"AlmaLinux:8","package":"cjose","fixed_in":["0.6.1-6.module_el8.10.0+4330+15616d81"],"sources":["osv"]},{"ecosystem":"AlmaLinux:8","package":"cjose-devel","fixed_in":["0.6.1-6.module_el8.10.0+4330+15616d81"],"sources":["osv"]},{"ecosystem":"AlmaLinux:8","package":"mod_auth_openidc","fixed_in":["2.4.9.4-9.module_el8.10.0+4297+63ae3533"],"sources":["osv"]},{"ecosystem":"TuxCare:AlmaLinux:9.6","package":"cjose","fixed_in":["0.6.1-17.el9.tuxcare.els1"],"sources":["osv"]},{"ecosystem":"TuxCare:AlmaLinux:9.6","package":"cjose-devel","fixed_in":["0.6.1-17.el9.tuxcare.els1"],"sources":["osv"]},{"ecosystem":"Debian:12","package":"cjose","fixed_in":["0.6.2.1-1+deb12u2"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"cjose","fixed_in":["0.6.2.3-1+deb13u1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"cjose","fixed_in":["0.6.2.7-1"],"sources":["osv"]},{"ecosystem":"Red Hat:enterprise_linux:10.2","package":"cjose","fixed_in":["0:0.6.2.2-7.el10_2.2"],"sources":["osv"]},{"ecosystem":"Red Hat:enterprise_linux:10.2","package":"cjose-debuginfo","fixed_in":["0:0.6.2.2-7.el10_2.2"],"sources":["osv"]},{"ecosystem":"Red Hat:enterprise_linux:10.2","package":"cjose-debugsource","fixed_in":["0:0.6.2.2-7.el10_2.2"],"sources":["osv"]},{"ecosystem":"Red Hat:enterprise_linux:10.2","package":"cjose-devel","fixed_in":["0:0.6.2.2-7.el10_2.2"],"sources":["osv"]},{"ecosystem":"Red Hat:enterprise_linux_eus:10.0","package":"cjose","fixed_in":["0:0.6.2.2-7.el10_0.2"],"sources":["osv"]},{"ecosystem":"Red Hat:enterprise_linux_eus:10.0","package":"cjose-debuginfo","fixed_in":["0:0.6.2.2-7.el10_0.2"],"sources":["osv"]},{"ecosystem":"Red Hat:enterprise_linux_eus:10.0","package":"cjose-debugsource","fixed_in":["0:0.6.2.2-7.el10_0.2"],"sources":["osv"]},{"ecosystem":"Red Hat:enterprise_linux_eus:10.0","package":"cjose-devel","fixed_in":["0:0.6.2.2-7.el10_0.2"],"sources":["osv"]},{"ecosystem":"Rocky Linux:10","package":"cjose","fixed_in":["0:0.6.2.2-7.el10_2.2"],"sources":["osv"]},{"ecosystem":"Rocky Linux:9","package":"cjose","fixed_in":["0:0.6.1-17.el9_8.2"],"sources":["osv"]},{"ecosystem":"Rocky Linux:8","package":"mod_auth_openidc","fixed_in":["0:2.4.9.4-9.module+el8.10.0+40373+8a3f15d2"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"AlmaLinux:10","package":"cjose","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.6.2.2-7.el10_2.2"}]}]},{"source":"osv","ecosystem":"AlmaLinux:10","package":"cjose-devel","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.6.2.2-7.el10_2.2"}]}]},{"source":"osv","ecosystem":"AlmaLinux:9","package":"cjose","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.6.1-17.el9_8.2"}]}]},{"source":"osv","ecosystem":"AlmaLinux:9","package":"cjose-devel","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.6.1-17.el9_8.2"}]}]},{"source":"osv","ecosystem":"AlmaLinux:8","package":"cjose","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.6.1-6.module_el8.10.0+4330+15616d81"}]}]},{"source":"osv","ecosystem":"AlmaLinux:8","package":"cjose-devel","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.6.1-6.module_el8.10.0+4330+15616d81"}]}]},{"source":"osv","ecosystem":"AlmaLinux:8","package":"mod_auth_openidc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.4.9.4-9.module_el8.10.0+4297+63ae3533"}]}]},{"source":"osv","ecosystem":"Azure Linux:3","package":"cjose","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"0.6.2.2-7"}]}]},{"source":"osv","ecosystem":"TuxCare:AlmaLinux:9.6","package":"cjose","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.6.1-17.el9.tuxcare.els1"}]}]},{"source":"osv","ecosystem":"TuxCare:AlmaLinux:9.6","package":"cjose-devel","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.6.1-17.el9.tuxcare.els1"}]}]},{"source":"osv","ecosystem":"Debian:12","package":"cjose","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.6.2.1-1+deb12u2"}]}],"versions":["0.6.2.1-1","0.6.2.1-1+deb12u1"]},{"source":"osv","ecosystem":"Debian:13","package":"cjose","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.6.2.3-1+deb13u1"}]}],"versions":["0.6.2.3-1"]},{"source":"osv","ecosystem":"Debian:14","package":"cjose","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.6.2.7-1"}]}],"versions":["0.6.2.3-1","0.6.2.4-1"]},{"source":"osv","ecosystem":"Mageia:10","package":"cjose","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.6.2.4-1.1.mga10"}]}],"bundled":2},{"source":"osv","ecosystem":"openEuler:24.03-LTS-SP3","package":"cjose","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.6.2.7-1.oe2403sp3"}]}],"bundled":2},{"source":"osv","ecosystem":"openEuler:24.03-LTS-SP4","package":"cjose","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.6.2.7-1.oe2403sp4"}]}],"bundled":2},{"source":"osv","ecosystem":"openEuler:20.03-LTS-SP4","package":"cjose","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.6.2.7-1.oe2003sp4"}]}],"bundled":2},{"source":"osv","ecosystem":"openEuler:22.03-LTS-SP4","package":"cjose","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.6.2.7-1.oe2203sp4"}]}],"bundled":2},{"source":"osv","ecosystem":"openEuler:24.03-LTS-SP1","package":"cjose","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.6.2.7-1.oe2403sp1"}]}],"bundled":2},{"source":"osv","ecosystem":"Red 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uses all-zero Content Encryption Key for AES-CBC-HMAC JWE encryption","description":"OpenIDC/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).","status":"published","published":"2026-09-08T23:36:13.668Z","modified":"2026-09-09T15:12:15.459Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical","assessor":"cna"}],"cwes":["CWE-321","CWE-330"],"updated_at":"2026-11-02T14:20:00.11477Z"}],"euvd":[{"id":"EUVD-2026-74299","description":"OpenIDC/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).","status":"published","published":"2026-09-08T23:36:13Z","modified":"2026-09-09T15:12:15Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical"}],"updated_at":"2026-11-02T17:28:26.882462Z"}],"nvd":[{"id":"CVE-2026-53939","description":"OpenIDC/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).","status":"published","published":"2026-09-09T00:17:31.7Z","modified":"2026-09-10T19:57:48.533Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical","assessor":"secondary"}],"cwes":["CWE-321","CWE-330"],"updated_at":"2026-11-02T14:12:45.612639Z"}],"osv":[{"id":"CVE-2026-53939","title":"OpenIDC/cjose uses all-zero Content Encryption Key for AES-CBC-HMAC JWE encryption","description":"OpenIDC/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).","status":"published","published":"2026-09-08T23:36:13.668Z","modified":"2026-10-29T22:57:03.60307548Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical"}],"cwes":["CWE-321","CWE-330"],"updated_at":"2026-11-02T15:45:08.132336Z"},{"id":"DEBIAN-CVE-2026-53939","description":"OpenIDC/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).","status":"published","published":"2026-09-09T00:17:31.7Z","modified":"2026-11-07T18:00:06.985064758Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical"}],"updated_at":"2026-11-07T18:20:56.314708Z"},{"id":"OESA-2026-4057","title":"cjose security update","description":"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\u0026apos;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)","status":"published","published":"2026-09-25T01:27:46Z","modified":"2026-09-25T01:45:07.895474859Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical"}],"updated_at":"2026-11-02T15:52:47.643553Z"},{"id":"RHSA-2026:80605","title":"Red Hat Security Advisory: cjose security update","status":"published","published":"2026-10-14T10:31:52Z","modified":"2026-10-17T10:20:38Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical"}],"updated_at":"2026-11-02T15:53:23.547034Z"},{"id":"RHSA-2026:83224","title":"Red Hat Security Advisory: cjose security update","status":"published","published":"2026-10-15T10:28:59Z","modified":"2026-10-17T10:21:15Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical"}],"updated_at":"2026-11-02T15:53:23.547034Z"},{"id":"RLSA-2026:80605","title":"Critical: cjose security update","description":"CJose is C library implementing the Javascript Object Signing and Encryption (JOSE).\n\nSecurity Fix(es):\n\n* cjose: OpenIDC/cjose uses all-zero Content Encryption Key for AES-CBC-HMAC JWE encryption (CVE-2026-53939)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.","status":"published","published":"2026-10-13T12:08:58.021554Z","modified":"2026-10-13T12:30:02.893807104Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical"}],"updated_at":"2026-11-02T15:53:26.449929Z"},{"id":"RLSA-2026:92145","title":"Critical: cjose security update","description":"CJose is C library implementing the Javascript Object Signing and Encryption (JOSE).\n\nSecurity Fix(es):\n\n* cjose: OpenIDC/cjose uses all-zero Content Encryption Key for AES-CBC-HMAC JWE encryption (CVE-2026-53939)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.","status":"published","published":"2026-10-30T12:04:27.805649Z","modified":"2026-10-30T12:30:03.142628768Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical"}],"updated_at":"2026-11-02T15:53:26.76659Z"},{"id":"RLSA-2026:92157","title":"Critical: mod_auth_openidc:2.3 security update","description":"The mod_auth_openidc is an OpenID Connect authentication module for Apache HTTP Server. It enables an Apache HTTP Server to operate as an OpenID Connect Relying Party and/or OAuth 2.0 Resource Server. \n\nSecurity Fix(es):\n\n* cjose: OpenIDC/cjose uses all-zero Content Encryption Key for AES-CBC-HMAC JWE encryption (CVE-2026-53939)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.","status":"published","published":"2026-10-30T00:01:28.043412Z","modified":"2026-10-30T00:30:02.811095473Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical"}],"updated_at":"2026-11-02T15:53:26.76659Z"},{"id":"UBUNTU-CVE-2026-53939","description":"OpenIDC/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).","status":"published","published":"2026-09-09T00:17:00Z","modified":"2026-10-17T12:59:03.521533011Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical"}],"updated_at":"2026-11-02T16:56:41.382716Z"},{"id":"ALSA-2026:80605","title":"Critical: cjose security update","description":"CJose is C library implementing the Javascript Object Signing and Encryption (JOSE).  \n\nSecurity Fix(es):  \n\n  * cjose: OpenIDC/cjose uses all-zero Content Encryption Key for AES-CBC-HMAC JWE encryption (CVE-2026-53939)\n\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n","status":"published","published":"2026-10-12T00:00:00Z","modified":"2026-10-29T11:31:00.418451399Z","updated_at":"2026-11-02T15:27:55.200553Z"},{"id":"ALSA-2026:92145","title":"Critical: cjose security update","description":"CJose is C library implementing the Javascript Object Signing and Encryption (JOSE).  \n\nSecurity Fix(es):  \n\n  * cjose: OpenIDC/cjose uses all-zero Content Encryption Key for AES-CBC-HMAC JWE encryption (CVE-2026-53939)\n\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n","status":"published","published":"2026-10-28T00:00:00Z","modified":"2026-10-29T22:45:02.316364842Z","updated_at":"2026-11-02T15:27:57.367731Z"},{"id":"ALSA-2026:92157","title":"Critical: mod_auth_openidc:2.3 security update","description":"The mod_auth_openidc is an OpenID Connect authentication module for Apache HTTP Server. It enables an Apache HTTP Server to operate as an OpenID Connect Relying Party and/or OAuth 2.0 Resource Server.   \n\nSecurity Fix(es):  \n\n  * cjose: OpenIDC/cjose uses all-zero Content Encryption Key for AES-CBC-HMAC JWE encryption (CVE-2026-53939)\n\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n","status":"published","published":"2026-10-29T00:00:00Z","modified":"2026-10-29T11:02:29.817376357Z","updated_at":"2026-11-02T15:27:57.367731Z"},{"id":"AZL-101096","title":"CVE-2026-53939 affecting package cjose 0.6.2.2-7","description":"OpenIDC/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).","status":"published","published":"2026-09-09T00:17:31Z","modified":"2026-11-05T05:36:30Z","updated_at":"2026-11-05T16:41:17.128158Z"},{"id":"CLSA-2026-1792632603","title":"cjose: Fix of CVE-2026-53939","description":"- CVE-2026-53939: fix all-zero AES-CBC-HMAC content-encryption key","status":"published","published":"2026-10-22T16:37:03Z","modified":"2026-10-26T09:31:36.64124833Z","updated_at":"2026-11-02T15:43:54.672859Z"},{"id":"MGASA-2026-0496","title":"Updated cjose packages fix security vulnerabilities","description":"The updated packages fix security vulnerabilities:\nHeap buffer overflow in AES Key Wrap decryption (A128KW/A192KW/A256KW).\n(CVE-2026-53938)\nAll-zero Content Encryption Key used for AES-CBC-HMAC JWE encryption.\n(CVE-2026-53939)\n","status":"published","published":"2026-10-12T20:48:13Z","modified":"2026-10-12T21:00:03.199222025Z","updated_at":"2026-11-02T15:49:43.795591Z"},{"id":"openSUSE-SU-2026:11784-1","title":"libcjose-devel-0.6.2.8-2.1 on GA media","description":"These are all security issues fixed in the libcjose-devel-0.6.2.8-2.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2026-09-15T00:00:00Z","modified":"2026-09-16T18:23:08.427100868Z","updated_at":"2026-11-02T16:58:39.516824Z"},{"id":"openSUSE-SU-2026:21944-1","title":"Security update for cjose","description":"This update for cjose fixes the following issues:\n\n- CVE-2026-53938: missing encrypted_key length validation during AES Key Wrap decryption can cause heap-based buffer\n  overflow (bsc#1279844).\n- CVE-2026-53939: zero-filled content-encryption key generation in AES-CBC-HMAC JWE encryption within cjose can allow\n  unauthorized content modification (bsc#1279846).\n","status":"published","published":"2026-09-23T19:43:03Z","modified":"2026-09-25T18:23:14.231396619Z","updated_at":"2026-11-02T16:58:42.426393Z"},{"id":"SUSE-SU-2026:23910-1","title":"Security update for cjose","description":"This update for cjose fixes the following issues:\n\n- CVE-2026-53938: missing encrypted_key length validation during AES Key Wrap decryption can cause heap-based buffer\n  overflow (bsc#1279844).\n- CVE-2026-53939: zero-filled content-encryption key generation in AES-CBC-HMAC JWE encryption within cjose can allow\n  unauthorized content modification (bsc#1279846).\n","status":"published","published":"2026-09-23T19:43:44Z","modified":"2026-09-30T18:23:12.221410101Z","updated_at":"2026-11-02T15:54:03.991985Z"},{"id":"SUSE-SU-2026:4237-1","title":"Security update for cjose","description":"This update for cjose fixes the following issues:\n\n- CVE-2026-53938: missing encrypted_key length validation during AES Key Wrap decryption can cause heap-based buffer\n  overflow (bsc#1279844).\n- CVE-2026-53939: zero-filled content-encryption key generation in AES-CBC-HMAC JWE encryption within cjose can allow\n  unauthorized content modification (bsc#1279846).\n","status":"published","published":"2026-09-17T11:47:13Z","modified":"2026-09-17T18:23:12.733755835Z","updated_at":"2026-11-02T15:54:05.392906Z"},{"id":"SUSE-SU-2026:4251-1","title":"Security update for cjose","description":"This update for cjose fixes the following issues:\n\n- CVE-2026-53938: missing encrypted_key length validation during AES Key Wrap decryption can cause heap-based buffer\n  overflow (bsc#1279844).\n- CVE-2026-53939: zero-filled content-encryption key generation in AES-CBC-HMAC JWE encryption within cjose can allow\n  unauthorized content modification (bsc#1279846).\n","status":"published","published":"2026-09-17T16:01:20Z","modified":"2026-09-18T10:00:05.157410206Z","updated_at":"2026-11-02T15:54:05.392906Z"},{"id":"SUSE-SU-2026:4253-1","title":"Security update for cjose","description":"This update for cjose fixes the following issues:\n\n- CVE-2026-53938: missing encrypted_key length validation during AES Key Wrap decryption can cause heap-based buffer\n  overflow (bsc#1279844).\n- CVE-2026-53939: zero-filled content-encryption key generation in AES-CBC-HMAC JWE encryption within cjose can allow\n  unauthorized content modification (bsc#1279846).  \n","status":"published","published":"2026-09-17T16:02:17Z","modified":"2026-09-18T10:00:04.860828276Z","updated_at":"2026-11-02T15:54:05.392906Z"}]}}