# thumbor (PyPI) vulnerabilities

6 known vulnerabilities (6 high), with the versions each affects and the releases that fix them.

## At a glance

- Latest release: 7.8.0 (May 30, 2026): no advisory affects it
- Newest unaffected release: 7.8.0 (May 30, 2026), the latest release
- Weekly downloads: 6,316
- Dependents: 24
- Releases: 118 since 4.1.3 (Jan 7, 2015)
- Registry: https://pypi.org/project/thumbor/
- Releases read: Nov 8, 2026

## Version timeline

Affected versions per advisory, in version order:

- CVE-2026-53502: 4.1.3 to 7.7.7 (7.8.0 is outside it)
- CVE-2026-53505: 4.1.3 to 7.7.7 (7.8.0 is outside it)
- CVE-2026-53504: 4.1.3 to 7.7.7 (7.8.0 is outside it)
- CVE-2026-53503: 4.1.3 to 7.7.7 (7.8.0 is outside it)
- CVE-2026-53501: 4.1.3 to 7.7.7 (7.8.0 is outside it)
- CVE-2026-53500: 4.1.3 to 7.7.7 (7.8.0 is outside it)

## Advisories (6)

### [CVE-2026-53502](https://cve.now/CVE-2026-53502): Thumbor has path traversal via post-validation URL decoding bypass in file\_loader

- Severity: High 8.7
- Published: Jul 31, 2026
- Affected: fixed in 7.8.0.
- Fixed in 7.8.0 (released May 30, 2026, 62 days before disclosure).
- The latest release, 7.8.0, is not affected.

### [CVE-2026-53505](https://cve.now/CVE-2026-53505): Thumbor proportion filter allows unbounded post-transform resize leading to remote DoS

- Severity: High 7.5
- Published: Jul 31, 2026
- Affected: fixed in 7.8.0.
- Fixed in 7.8.0 (released May 30, 2026, 62 days before disclosure).
- The latest release, 7.8.0, is not affected.

### [CVE-2026-53504](https://cve.now/CVE-2026-53504): Thumbor has Regex Denial of Service (ReDoS) in \`convolution\` filter

- Severity: High 7.5
- Published: Jul 31, 2026
- Affected: fixed in 7.8.0.
- Fixed in 7.8.0 (released May 30, 2026, 62 days before disclosure).
- The latest release, 7.8.0, is not affected.

### [CVE-2026-53503](https://cve.now/CVE-2026-53503): Thumbor convolution filter allows divide-by-zero in C extension leading to remote DoS

- Severity: High 7.5
- Published: Jul 31, 2026
- Affected: fixed in 7.8.0.
- Fixed in 7.8.0 (released May 30, 2026, 62 days before disclosure).
- The latest release, 7.8.0, is not affected.

### [CVE-2026-53501](https://cve.now/CVE-2026-53501): Thumbor has HMAC validation bypass via multiple .replace() calls when removing URL signature

- Severity: High 8.2
- Published: Jul 31, 2026
- Affected: fixed in 7.8.0.
- Fixed in 7.8.0 (released May 30, 2026, 62 days before disclosure).
- The latest release, 7.8.0, is not affected.

### [CVE-2026-53500](https://cve.now/CVE-2026-53500): Thumbor treats ALLOWED\_SOURCES string patterns as unescaped regex, allowing hostname bypass via wildcard dot

- Severity: High 8.2
- Published: Jul 31, 2026
- Affected: fixed in 7.8.0.
- Fixed in 7.8.0 (released May 30, 2026, 62 days before disclosure).
- The latest release, 7.8.0, is not affected.

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