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Thumbor treats ALLOWED_SOURCES string patterns as unescaped regex, allowing hostname bypass via wildcard dot

Thumbor treats ALLOWED_SOURCES string patterns as unescaped regex, allowing hostname bypass via wildcard dot

CVE-2026-53500Published 5 days agoUpdated 1 day agoSource: OSV

Affected packages

  • thumborbefore 7.8.0

Exploit signal

Known exploited (CISA KEV)
No
EPSS score
0.29%
EPSS percentile
20.9%

EPSS is the probability a CVE is exploited in the wild; percentile is its rank among all CVEs. This advisory is in the top 21%.

Thumbor treats ALLOWED_SOURCES string patterns as unescaped regex, allowing hostname bypass via wildcard dot | HackTribune