CVE-2026-65627: fallo de gravedad media en potatosalad jose
Decompression bomb via unbounded zlib:inflate in jose_jwe_zip:uncompress/2
Publicada el · Actualizada el
Aviso por correo cuando entre en el KEV, tenga PoC pública o suba de nota.
13Vexday Risk Score
Sin señal de explotación. Ningún artefacto público de explotación conocido hasta ahora.
ssvc Trackcvss 6.9epss 0.2%
Improper Handling of Highly Compressed Data (Data Amplification) vulnerability in potatosalad jose (erlang-jose) allows a remote attacker to exhaust a node's memory with a small crafted JWE token.
The jose_jwe_zip:uncompress/2 function in src/jwe/jose_jwe_zip.erl decompresses the DEFLATE-compressed plaintext of a JWE that carries the optional zip: DEF header by calling zlib:inflate/2 on the entire attacker-controlled stream, with no bound on the output size or the inflation ratio. Raw DEFLATE reaches ratios around 1000:1 on highly repetitive input, so a few-kilobyte token inflates to hundreds of megabytes or gigabytes in a single call.
Decompression runs automatically during decryption through jose_jwe:block_decrypt/2 (JOSE.JWE.block_decrypt/2 in Elixir), before the recipient can inspect or reject the payload. With the common asymmetric key-management algorithms (RSA-OAEP, ECDH-ES) an attacker needs only the recipient's public key to craft such a token, so no authentication or secret material is required. A single small token can exhaust the node's memory and crash the BEAM, denying service to all users.
This issue affects jose: from 1.0.0 before 1.11.13.
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Productos afectados
potatosalad · joseCVEs relacionadas — potatosalad jose
En el mismo producto, de las más peligrosas a las menos.
CVE-2026-65631MEDIUMerlang-jose RSA JWK parsing attempts to factor an attacker-controlled modulus, enabling CPU-exhaustion denial of serviceEPSS 0.2%CVE-2026-65630MEDIUMTiming side-channel in pure-Erlang X25519 scalar multiplication leaks the private key in joseEPSS 0.1%CVE-2026-65628MEDIUMInfinite recursion (CPU denial-of-service) in JOSE.JWK.shared_secret/2 on mismatched key typesEPSS 0.1%CVE-2026-65625MEDIUMAttacker-controlled AES-GCM authentication tag length allows tag forgery in joseEPSS 0.1%CVE-2026-65632MEDIUMECDSA signature length is not validated in jose, allowing signature malleabilityEPSS 0.1%CVE-2026-65626MEDIUMBleichenbacher padding oracle in RSAES-PKCS1-v1_5 decryption in joseEPSS 0.1%
Referencias
https://cna.erlef.org/cves/CVE-2026-65627.htmlhttps://github.com/potatosalad/erlang-jose/commit/857eb8e7f2d33e2c9ca2189e77226561cacaf2adhttps://github.com/potatosalad/erlang-jose/commit/a7746ecd4950f85a393136e449a91dac62b5c429https://github.com/potatosalad/erlang-jose/security/advisories/GHSA-wfpv-qxp8-x5gmhttps://osv.dev/vulnerability/EEF-CVE-2026-65627