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CVE-2026-115504— CFITSIO through 4.7.0 Out-of-Bounds Write via ffgcls2 in getcols.c

Quick assessment

Affected
HEASARC cfitsio
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

CFITSIO 4.7.0 及更早版本在 getcols.c 中的 ffgcls2() 函数存在越界写入漏洞。该函数在处理变长字符串列时，会信任攻击者控制的堆描述符长度。攻击者可构造恶意 FITS 文件，导致固定的 28,800 字节栈缓冲区以及调用方的字符串数组发生溢出，从而实现任意代码执行。

CVSS 7.8 · High

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
HEASARC cfitsio ≤ 4.7.0 affected
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I. Basic Information for CVE-2026-115504

Vulnerability Information
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Vulnerability Title
CFITSIO through 4.7.0 Out-of-Bounds Write via ffgcls2 in getcols.c
Source: CVE Program / CVE List V5
Vulnerability Description
CFITSIO through 4.7.0 contains an out-of-bounds write vulnerability in ffgcls2() in getcols.c that trusts attacker-controlled heap descriptor lengths for variable-length string columns. Attackers can supply a crafted FITS file that overflows a fixed 28,800-byte stack buffer and the caller's string array, enabling arbitrary code execution.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存写
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
HEASARC cfitsio 0 ~ 4.7.0 -

II. Public POCs for CVE-2026-115504

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III. Intelligence Information for CVE-2026-115504

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Vendor Pages for CVE-2026-115504 (1)

Other References for CVE-2026-115504 (4)

IV. Related Vulnerabilities

Same product: cfitsio
Same vendor: HEASARC
Same weakness: CWE-787

V. Comments for CVE-2026-115504

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