diff --git a/libavformat/imf_cpl.c b/libavformat/imf_cpl.c
index f2c6b6f064..a688a44711 100644
--- a/libavformat/imf_cpl.c
+++ b/libavformat/imf_cpl.c
@@ -76,6 +76,8 @@ int ff_imf_xml_read_uuid(xmlNodePtr element, AVUUID uuid)
     int ret = 0;
 
     element_text = xmlNodeListGetString(element->doc, element->xmlChildrenNode, 1);
+    if (!element_text)
+        return AVERROR_INVALIDDATA;
     ret = av_uuid_urn_parse(element_text, uuid);
     if (ret) {
         av_log(NULL, AV_LOG_ERROR, "Invalid UUID\n");
@@ -92,7 +94,7 @@ int ff_imf_xml_read_rational(xmlNodePtr element, AVRational *rational)
     int ret = 0;
 
     element_text = xmlNodeListGetString(element->doc, element->xmlChildrenNode, 1);
-    if (sscanf(element_text, "%i %i", &rational->num, &rational->den) != 2) {
+    if (element_text == NULL || sscanf(element_text, "%i %i", &rational->num, &rational->den) != 2) {
         av_log(NULL, AV_LOG_ERROR, "Invalid rational number\n");
         ret = AVERROR_INVALIDDATA;
     }
@@ -107,7 +109,7 @@ int ff_imf_xml_read_uint32(xmlNodePtr element, uint32_t *number)
     int ret = 0;
 
     element_text = xmlNodeListGetString(element->doc, element->xmlChildrenNode, 1);
-    if (sscanf(element_text, "%" PRIu32, number) != 1) {
+    if (element_text == NULL || sscanf(element_text, "%" PRIu32, number) != 1) {
         av_log(NULL, AV_LOG_ERROR, "Invalid unsigned 32-bit integer");
         ret = AVERROR_INVALIDDATA;
     }