CVE-2026-53501 Thumbor has HMAC validation bypass via multiple .replace() calls when removing URL signature

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...

CVE-2026-53501

Thumbor (open-source image thumbnail service by globo.com) is affected prior to version 7.8.0. The vulnerability stems from using Python’s .replace() to strip the signature from the URL before HMAC validation, which removes all occurrences of the substring. An attacker can insert the same signatu...

CVE-2026-58181

The Apache Traffic Server urisigning and urlsig plugins can exhaust the stack or crash on attacker input. This issue affects Apache Traffic Server: from 8.0.0 through 8.1.9, from 9.0.0 through 9.2.14, from 10.0.0 through 10.1.3. Users are recommended to upgrade to version 9.2.15 or 10.1.4, which...

PT-2026-65758

The Apache Traffic Server uri signing and url sig plugins can exhaust the stack or crash on attacker input. This issue affects Apache Traffic Server: from 8.0.0 through 8.1.9, from 9.0.0 through 9.2.14, from 10.0.0 through 10.1.3. Users are recommended to upgrade to version 9.2.15 or 10.1.4, whic...