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CVE-2026-78367— Rpm: rpmbuild gettarspec() crafted tar member name → macro injection

Quick assessment

Affected
Red Hat Red Hat Enterprise Linux 10
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

RPM是Rpm团队开源的一款操作系统软件包管理工具。 RPM存在输入验证错误漏洞，该漏洞源于在tarball模式下处理特制tarball时，特制的tar成员名称可能导致宏注入，远程攻击者通过诱骗用户构建恶意tarball可在系统上执行任意代码。

CVSS 7.0 · High EPSS 0.20% · P9

Affected Version Matrix 6

VendorProduct Version RangeStatus
Red Hat Red Hat Enterprise Linux 10 any affected
Red Hat Red Hat Enterprise Linux 6 any unknown
Red Hat Red Hat Enterprise Linux 7 any affected
Red Hat Red Hat Enterprise Linux 8 any affected
Red Hat Red Hat Enterprise Linux 9 any affected
Red Hat Red Hat Hardened Images any affected
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I. Basic Information for CVE-2026-78367

Vulnerability Information
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Vulnerability Title
Rpm: rpmbuild gettarspec() crafted tar member name → macro injection
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability was found in RPM's rpmbuild tarball processing. When processing a crafted source archive, the getTarSpec() function in tools/rpmbuild.cc passes an attacker-controlled tar archive member name to rpmExpand() as part of a %{basename:...} macro expression. A specially crafted .spec member name can therefore inject RPM macros, including Lua expressions, resulting in arbitrary code execution with the privileges of the user running rpmbuild. This can be exploited when a victim or automated build system processes an attacker-controlled source tarball using rpmbuild tarball mode (such as -ts, -ta, or -tb).
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对生成代码的控制不恰当(代码注入)
Source: CVE Program / CVE List V5
Vulnerability Title
RPM 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
RPM是Rpm团队开源的一款操作系统软件包管理工具。 RPM存在输入验证错误漏洞，该漏洞源于在tarball模式下处理特制tarball时，特制的tar成员名称可能导致宏注入，远程攻击者通过诱骗用户构建恶意tarball可在系统上执行任意代码。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Red Hat Red Hat Enterprise Linux 10 - cpe:/o:redhat:enterprise_linux:10
Red Hat Red Hat Enterprise Linux 6 - cpe:/o:redhat:enterprise_linux:6
Red Hat Red Hat Enterprise Linux 7 - cpe:/o:redhat:enterprise_linux:7
Red Hat Red Hat Enterprise Linux 8 - cpe:/o:redhat:enterprise_linux:8
Red Hat Red Hat Enterprise Linux 9 - cpe:/o:redhat:enterprise_linux:9
Red Hat Red Hat Hardened Images - cpe:/a:redhat:hummingbird:1

II. Public POCs for CVE-2026-78367

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 7535 chars
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III. Intelligence Information for CVE-2026-78367

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Vendor Advisories for CVE-2026-78367 (1)

Proof of Concept for CVE-2026-78367 (1)

Same Patch Batch · Red Hat · 2026-08-24 · 5 CVEs total

CVE-2026-71366 7.7 HIGH Awx: notification backends allow ssrf and credential leakage
CVE-2026-71364 7.2 HIGH Awx: project archive extraction allows path traversal file writes
CVE-2026-19685 7.1 HIGH Networkmanager: networkmanager: 802-1x ca-path and phase2-ca-path bypass private_user rest
CVE-2026-78323 6.5 MEDIUM Jss: jss: jsstrustmanager does not verify nss trust flags on ca certificates

IV. Related Vulnerabilities

Same product: Red Hat Enterprise Linux 10
Same vendor: Red Hat
Same weakness: CWE-94

V. Comments for CVE-2026-78367

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