CVE-2026-53500

8.2 highEPSS 0.5%

High (8.2). EPSS 0.5% chance of exploitation in the next 30 days. Fixed in thumbor 7.8.0.

Thumbor is an open-source photo thumbnail service by globo.com. Prior to 7.8.0, the ALLOWED_SOURCES configuration passes plain strings to re.match() without escaping dots, so a hostname differing at dot positions can match the allowlist. This issue is fixed in 7.8.0.

Severity

CVSS 3.1

8.2 high

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:L

EPSS: 0.5% chance of exploitation in the next 30 days; higher than 42% of CVEs (scores of 2026-10-31)
CWE: CWE-918
Published: 2026-07-31
Modified: 2026-09-08
Record from: the NVD, synced 2026-10-19

Packages (OSV)

Advisory	Ecosystem	Package	Affected	Fixed in
GHSA-6x26-6r6f-m537	PyPI	thumbor	<7.8.0	7.8.0
PYSEC-2026-3617	PyPI	thumbor	<7.8.0	7.8.0

References

https://github.com/thumbor/thumbor/commit/68876715350c6c8f49c324e5515e64908830aed7
https://github.com/thumbor/thumbor/releases/tag/7.8.0
https://github.com/thumbor/thumbor/security/advisories/GHSA-6x26-6r6f-m537
https://github.com/thumbor/thumbor/security/advisories/GHSA-6x26-6r6f-m537

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