GHSA-CQJP-JF4R-H5Q9 Thumbor convolution filter allows divide-by-zero in C extension leading to remote DoS

Summary Thumbor's filters:convolution, , filter passes the user-controlled value to a C extension thumbor/ext/filters/convolution.c where it is used as a divisor for % and / without validating columns 0. When columns=0, the C code triggers undefined behavior; on x8664 this reliably results in a...

Division by zero

Overview thumbor is a thumbor is an open-source photo thumbnail service by globo.com Affected versions of this package are vulnerable to Division by zero via the convolution filter process in the C extension when user-controlled input is used as a divisor without validation. An attacker can cause...

Thumbor convolution filter allows divide-by-zero in C extension leading to remote DoS

Summary Thumbor's filters:convolution, , filter passes the user-controlled value to a C extension thumbor/ext/filters/convolution.c where it is used as a divisor for % and / without validating columns 0. When columns=0, the C code triggers undefined behavior; on x8664 this reliably results in a...

CVE-2026-53503

Thumbor CVE-2026-53503 documents a vulnerability in the filters:convolution filter prior to 7.8.0 where the user-supplied columns value is passed to a C extension (thumbor/ext/filters/_convolution.c) as a divisor without validating that columns > 0. If columns is 0, the C code triggers undefin...

CVE-2026-53503

Thumbor is an open-source photo thumbnail service by globo.com. Prior to 7.8.0, Thumbor's filters:convolution, , filter passes the user-controlled value to a C extension thumbor/ext/filters/convolution.c where it is used as a divisor for % and / without validating columns 0. When columns=0, the C...

EUVD-2026-51609

Thumbor is an open-source photo thumbnail service by globo.com. Prior to 7.8.0, Thumbor's filters:convolution, , filter passes the user-controlled value to a C extension thumbor/ext/filters/convolution.c where it is used as a divisor for % and / without validating columns 0. When columns=0, the C...

CVE-2026-53503 Thumbor convolution filter allows divide-by-zero in C extension leading to remote DoS

Thumbor is an open-source photo thumbnail service by globo.com. Prior to 7.8.0, Thumbor's filters:convolution, , filter passes the user-controlled value to a C extension thumbor/ext/filters/convolution.c where it is used as a divisor for % and / without validating columns 0. When columns=0, the C...

CVE-2026-53503 Thumbor convolution filter allows divide-by-zero in C extension leading to remote DoS

Thumbor is an open-source photo thumbnail service by globo.com. Prior to 7.8.0, Thumbor's filters:convolution, , filter passes the user-controlled value to a C extension thumbor/ext/filters/convolution.c where it is used as a divisor for % and / without validating columns 0. When columns=0, the C...

CVE-2026-53503 Thumbor convolution filter allows divide-by-zero in C extension leading to remote DoS

Thumbor is an open-source photo thumbnail service by globo.com. Prior to 7.8.0, Thumbor's filters:convolution, , filter passes the user-controlled value to a C extension thumbor/ext/filters/convolution.c where it is used as a divisor for % and / without validating columns 0. When columns=0, the C...

CVE-2026-53503: Improper Input Validation

Thumbor is an open-source photo thumbnail service by globo.com. Prior to 7.8.0, Thumbor's filters:convolution , , filter passes the user-controlled value to a C extension thumbor/ext/filters/convolution.c where it is used as a divisor for % and / without validating columns 0. When columns=0, the ...

PT-2026-66841

Name of the Vulnerable Software and Affected Versions Thumbor versions prior to 7.8.0 Description The convolution filter regular expression performs exponential backtracking when processing crafted repeated numeric input. This leads to a Regular Expression Denial of Service ReDoS, where a special...

CVE-2026-53504: Uncontrolled Resource Consumption

Thumbor is an open-source photo thumbnail service by globo.com. Prior to 7.8.0, the convolution filter regular expression performs exponential backtracking on crafted repeated numeric input, allowing a URL request to exhaust processing time. This issue is fixed in 7.8.0...

PT-2026-66840

Name of the Vulnerable Software and Affected Versions Thumbor versions prior to 7.8.0 Description A remote denial of service exists in the filters:convolution, , filter. The filter passes the user-controlled columns variable to a C extension thumbor/ext/filters/ convolution.c where it is used as ...

PYSEC-2026-3111 TensorFlow has Floating Point Exception in TFLite in conv kernel

Impact Constructing a tflite model with a paramater filterinputchannel of less than 1 gives a FPE. Patches We have patched the issue in GitHub commit 34f8368c535253f5c9cb3a303297743b62442aaa. The fix will be included in TensorFlow 2.12. We will also cherrypick this commit on TensorFlow 2.11.1. Fo...

TensorFlow has Floating Point Exception in TFLite in conv kernel

ImpactConstructing a tflite model with a paramater filterinputchannel of less than 1 gives a FPE. PatchesWe have patched the issue in GitHub commit 34f8368c535253f5c9cb3a303297743b62442aaa.The fix will be included in TensorFlow 2.12. We will also cherrypick this commit on TensorFlow 2.11.1. For...

PYSEC-2026-3279 TensorFlow has Floating Point Exception in TFLite in conv kernel

Impact Constructing a tflite model with a paramater filterinputchannel of less than 1 gives a FPE. Patches We have patched the issue in GitHub commit 34f8368c535253f5c9cb3a303297743b62442aaa. The fix will be included in TensorFlow 2.12. We will also cherrypick this commit on TensorFlow 2.11.1. Fo...

PYSEC-2026-3228 TensorFlow vulnerable to floating point exception in `Conv2D`

Impact If Conv2D is given empty input and the filter and padding sizes are valid, the output is all-zeros. This causes division-by-zero floating point exceptions that can be used to trigger a denial of service attack. python import tensorflow as tf import numpy as np with tf.device"CPU": also can...

TensorFlow segfault TFLite converter on per-channel quantized transposed convolutions

ImpactWhen converting transposed convolutions using per-channel weight quantization the converter segfaults and crashes the Python process.pythonimport tensorflow as tfclass QuantConv2DTransposedtf.keras.layers.Layer: def buildself, inputshape: self.kernel = self.addweight"kernel", 3, 3,...

PYSEC-2026-3291 TensorFlow segfault TFLite converter on per-channel quantized transposed convolutions

Impact When converting transposed convolutions using per-channel weight quantization the converter segfaults and crashes the Python process. python import tensorflow as tf class QuantConv2DTransposedtf.keras.layers.Layer: def buildself, inputshape: self.kernel = self.addweight"kernel", 3, 3,...

PYSEC-2026-3128 TensorFlow segfault TFLite converter on per-channel quantized transposed convolutions

Impact When converting transposed convolutions using per-channel weight quantization the converter segfaults and crashes the Python process. python import tensorflow as tf class QuantConv2DTransposedtf.keras.layers.Layer: def buildself, inputshape: self.kernel = self.addweight"kernel", 3, 3,...