CVE-2026-65626

Что произошло

The pure-Erlang RSAES-PKCS1-v1_5 decryption in the jose_jwa_pkcs1 module is a Bleichenbacher padding oracle. eme_pkcs1_decode/2 returns the recovered message when a decrypted block has valid PKCS#1 v1.5 padding (a leading 0x00 0x02, a padding string of at least eight non-zero bytes, and a 0x00 separator) and returns a distinct error result otherwise, and rsaes_pkcs1_decrypt/2 additionally returns {error, {badsize, _}} when the length check fails. The implementation applies no implicit-rejection countermeasure (RFC 8017 §7.2.2): it does not substitute a deterministic pseudo-random plaintext on a padding failure, so a one-bit padding-conformance signal leaks to the caller. Because the underlying modular exponentiation in dp/2 is a raw, non-blinded crypto:mod_pow/3, the padding check also stays distinguishable by timing even when an application normalizes every failure to a single error value. An unauthenticated attacker who knows only the public RSA key and can submit ciphertexts to a decryption endpoint that unwraps RSA1_5 JWE keys (or otherwise calls decrypt_private/3 with rsa_pkcs1_padding) can use this oracle to recover the plaintext of intercepted ciphertexts, such as content-encryption keys and thus the protected message, or to forge signatures, through roughly 10^4 to 10^6 adaptive chosen-ciphertext queries. This issue affects jose: from 1.3.0 before 1.11.13.

Что делать

dpkg-query -W -f='${Package}	${Version}\n'

rpm -qa --qf '%{NAME}\t%{VERSION}-%{RELEASE}\n'

Get-HotFix | Select-Object HotFixID, InstalledOn

Продукты и затронутые версии

{
  "status": "affected",
  "version": "1.3.0",
  "lessThan": "1.11.13",
  "versionType": "semver"
}

cpe:2.3:a:potatosalad:jose:*:*:*:*:*:*:*:*

{
  "status": "affected",
  "version": "853c5d4c4c0bd2a7ecb055b237f4284184e176c8",
  "lessThan": "0eac8cef9aaa48fb6846f4e47a0002dc4a73966d",
  "versionType": "git"
}

cpe:2.3:a:potatosalad:jose:*:*:*:*:*:*:*:*

CVSS: оценки и векторы

CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Источники и ссылки

{
  "cwes": [
    "cve",
    "nvd"
  ],
  "epss": {
    "source": "epss",
    "received_at": "2026-11-02T21:13:41.496999+00:00"
  },
  "title": {
    "source": "cve",
    "received_at": "2026-11-02T20:26:20.711019+00:00"
  },
  "scores": [
    "cve",
    "nvd"
  ],
  "status": {
    "source": "cve",
    "received_at": "2026-11-02T20:26:20.711019+00:00"
  },
  "affected": [
    "cve"
  ],
  "published": {
    "source": "cve",
    "received_at": "2026-11-02T20:26:20.711019+00:00"
  },
  "solutions": [],
  "percentile": {
    "source": "epss",
    "received_at": "2026-11-02T21:13:41.496999+00:00"
  },
  "references": [
    "cve",
    "nvd"
  ],
  "description": {
    "source": "cve",
    "received_at": "2026-11-02T20:26:20.711019+00:00"
  },
  "workarounds": [],
  "configurations": []
}

Хронология записи

1. Данные обновлены03.11.2026, 00:13
2. Данные обновлены02.11.2026, 00:12
3. Данные обновлены31.10.2026, 11:59
4. Появились сведения об исправлении28.10.2026, 22:23
5. Данные обновлены28.10.2026, 18:06
6. Опубликована28.10.2026, 15:17

Личная заметка и статус

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