Pillow: Quadratic GIF comment copying during save

影響: pip:pillow >= 9.2.0, < 13.0.0 → 13.0.0

On Pillow 12.3.0 and upstream main (ad277e2761b489681e71b51e91367d46b0ceabb9), a GIF with a long comment makes _get_global_header() copy portions of the comment repeatedly when saving, including comments carried over from untrusted images. I suggest provisional Moderate severity for crafted-image CPU denial of service, with CVSS-B 6.9 assuming a network service automatically opens unauthenticated uploads and they are resaved as GIFs; impact depends on input-size, concurrency, and worker CPU lim…

在 GitHub Advisory Database 阅读

2026/10/22 05:38，GitHub Advisory Database 发布了“Pillow: Quadratic GIF comment copying during save”（类型：漏洞公告）。严重程度为“中危”（medium）。相关技术：Python。CVE：CVE-2026-112891。