diff --git a/fuzzers/common.h b/fuzzers/common.h
index e7c29966a4..33a8424862 100644
--- a/fuzzers/common.h
+++ b/fuzzers/common.h
@@ -25,6 +25,8 @@
 
 #include <mpv/client.h>
 
+#define MAX_FUZZ_SIZE (100 << 10) // 100 KiB
+
 int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size);
 
 #define MPV_STRINGIFY_(X) #X
diff --git a/fuzzers/fuzzer_json.c b/fuzzers/fuzzer_json.c
index 1723a68cc2..b8e01373b1 100644
--- a/fuzzers/fuzzer_json.c
+++ b/fuzzers/fuzzer_json.c
@@ -22,6 +22,9 @@
 
 int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
 {
+    if (size > MAX_FUZZ_SIZE)
+        return 0;
+
     void *tmp = talloc_new(NULL);
     char *s = talloc_array_ptrtype(tmp, s, size + 1);
     memcpy(s, data, size);
diff --git a/fuzzers/fuzzer_load.c b/fuzzers/fuzzer_load.c
index 39075fb90f..db3b192075 100644
--- a/fuzzers/fuzzer_load.c
+++ b/fuzzers/fuzzer_load.c
@@ -27,6 +27,9 @@
 
 int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
 {
+    if (size > MAX_FUZZ_SIZE)
+        return 0;
+
 #ifdef MPV_LOAD_CONFIG_FILE
     // config file size limit, see m_config_parse_config_file()
     if (size > 1000000000)
diff --git a/fuzzers/fuzzer_loadfile_direct.c b/fuzzers/fuzzer_loadfile_direct.c
index be2fb1110d..f12134f22f 100644
--- a/fuzzers/fuzzer_loadfile_direct.c
+++ b/fuzzers/fuzzer_loadfile_direct.c
@@ -24,6 +24,9 @@
 
 int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
 {
+    if (size > MAX_FUZZ_SIZE)
+        return 0;
+
     if (size <= 1 || data[size - 1] != '\0')
         return 0;
 
diff --git a/fuzzers/fuzzer_set_property.c b/fuzzers/fuzzer_set_property.c
index 04bda40623..f5c17c342a 100644
--- a/fuzzers/fuzzer_set_property.c
+++ b/fuzzers/fuzzer_set_property.c
@@ -19,6 +19,9 @@
 
 int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
 {
+    if (size > MAX_FUZZ_SIZE)
+        return 0;
+
     size_t value_len;
     switch (MPV_FORMAT)
     {