Photo library permission is the mobile operating system authorization that lets an app read stored photos and videos. On Android and iOS, this access is supposed to be granted only when an app has a legitimate need, such as picking an image or organizing media. Because camera rolls often contain screenshots, documents, recovery codes, and other sensitive material, this permission can expose far more than casual pictures.
In cyber security, this permission matters because attackers can abuse it without exploiting the operating system itself. A malicious or overprivileged app may request gallery access, then scan images with OCR or upload them to attacker-controlled servers. Defenders look for apps whose function does not justify broad media access, and for unusual combinations of permission prompts plus outbound data transfers. Limiting access to selected photos and avoiding screenshots of secrets reduces the risk.