CVE-2026-53501

Katalog CVE

CVSS 8.2 · High EPSS 0,35%

Kerentanan Improper Verification of Cryptographic Signature. Skor CVSS 3.1 8.2 (High) menurut github.com.

Deskripsi (NVD)

Thumbor is an open-source photo thumbnail service by globo.com. Prior to 7.8.0, Thumbor’s HMAC validation can be bypassed due to the use of Python’s .replace() when removing the signature from the URL before validation. Since .replace() removes all occurrences of the substring, an attacker can insert the same signature multiple times in the URL and manipulate the final URL used for validation. This allows crafting URLs where the validated string differs from the actual requested resource, enabling loading images from unintended domains or paths. This issue is fixed in 7.8.0.

Rincian

Terbit di NVD

31 Juli 2026

Terakhir diubah

8 September 2026

Status NVD

Deferred

CVSS 3.1

8.2 (High), sumber github.com
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-347: Improper Verification of Cryptographic Signature

EPSS (30 hari)

0,35% peluang dieksploitasi; lebih tinggi dari 27,0% CVE lain

Produk dan versi terdampak

NVD belum mencantumkan data produk (CPE) untuk CVE ini. Produk yang terdampak biasanya disebut di deskripsi dan di advisory vendor pada daftar referensi.

Referensi dan perbaikan

• https://github.com/thumbor/thumbor/commit/e3ae3e2500537b4d735df4144129a649374bb70b
• https://github.com/thumbor/thumbor/releases/tag/7.8.0
• https://github.com/thumbor/thumbor/security/advisories/GHSA-mw3h-qjxj-6xg9