CVE-2026-105274— Erlang/OTP hex_core 无限制解压漏洞
一分钟漏洞结论
影响对象
erlang rebar3
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
Erlang 虚拟机中 hex_core 模块存在“高度压缩数据处理不当（数据放大）”漏洞。该漏洞允许不受信任的仓库镜像或响应 hex_core API 请求的服务器耗尽运行 hex_core 的 Erlang 虚拟机的内存。相同的代码也被内联（vendored）到 Hex（mix_hex_repo、mix_hex_api）和 rebar3（r3_hex_repo、r3_hex_api）中。 hex_repo 模块中的 、 、 和 函数会先使用 解压注册表响应数据，并在验证签名之前解码签名信封。由于镜像服务器没有仓
可能的 ATT&CK 技术 1 AI
T1190 · Exploit Public-Facing Application影响版本矩阵 6
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| erlang | rebar3 | 3.9.1< 3.27.3 |
affected |
209c02ec57c2cc3207ee0174c3af3675b8dc8f79< 360838a22f5b3a88c0358207f2923059bcbb3afb |
affected | ||
| hexpm | hex | 2.1.0< 2.5.2 |
affected |
671f695ac548ed01f5828c2a739ecaa942b21007< d8b60eee97abb119d525306f048969a217d793a5 |
affected | ||
| hexpm | hex_core | 0.1.0< 0.20.0 |
affected |
fbb6d9de472e5edb8d6fb6b32a91cb266137892e< ebe25d110717f6a3addba5232cd4a7dc1c76b628 |
affected |
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一、 漏洞 CVE-2026-105274 基础信息
漏洞信息
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Vulnerability Title
hex_core decompresses registry and Erlang term API responses without size limits
来源: CVE Program / CVE List V5
Vulnerability Description
Improper Handling of Highly Compressed Data (Data Amplification) vulnerability in hexpm hex_core allows an untrusted repository mirror, or a server answering hex_core's API requests, to exhaust the memory of the Erlang VM running hex_core. The same code is vendored in Hex (mix_hex_repo, mix_hex_api) and rebar3 (r3_hex_repo, r3_hex_api).
hex_repo:get_names/1, hex_repo:get_versions/1, hex_repo:get_package/2 and hex_repo:get_policy/2 decompress the registry response with zlib:gunzip/1 and decode the signed envelope before verifying its signature. A mirror doesn't have the repository's private key, but it chooses the compressed bytes, so a small response decompresses into an envelope of any size before the signature check rejects it.
hex_api decodes responses with the application/vnd.hex+erlang content type through hex_safe_binary_to_term:safe_binary_to_term/1, which calls binary_to_term(Binary, [safe]). The safe option prevents atom creation, but it accepts compressed terms and doesn't limit the size of the decoded term, and the check that rejects functions and ports runs after the term has been built. The fix for CVE-2026-21619 added the safe option and that check without bounding the decoded size.
This issue affects rebar3: from 3.9.1 before 3.27.3; hex: from 2.1.0 before 2.5.2; hex_core: from 0.1.0 before 0.20.0.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
来源: CVE Program / CVE List V5
Vulnerability Type
对高度压缩数据的处理不恰当(数据放大攻击)
来源: CVE Program / CVE List V5
受影响产品
| 厂商 | 产品 | 影响版本 | CPE | 订阅 |
|---|---|---|---|---|
| erlang | rebar3 | 3.9.1 ~ 3.27.3 |
cpe:2.3:a:erlang:rebar3:*:*:*:*:*:*:*:*
|
|
| erlang | rebar3 | 209c02ec57c2cc3207ee0174c3af3675b8dc8f79 ~ 360838a22f5b3a88c0358207f2923059bcbb3afb |
cpe:2.3:a:erlang:rebar3:*:*:*:*:*:*:*:*
|
|
| hexpm | hex_core | 0.1.0 ~ 0.20.0 |
cpe:2.3:a:hexpm:hex_core:*:*:*:*:*:*:*:*
|
|
| hexpm | hex_core | fbb6d9de472e5edb8d6fb6b32a91cb266137892e ~ ebe25d110717f6a3addba5232cd4a7dc1c76b628 |
cpe:2.3:a:hexpm:hex_core:*:*:*:*:*:*:*:*
|
|
| hexpm | hex | 2.1.0 ~ 2.5.2 |
cpe:2.3:a:hexpm:hex:*:*:*:*:*:*:*:*
|
|
| hexpm | hex | 671f695ac548ed01f5828c2a739ecaa942b21007 ~ d8b60eee97abb119d525306f048969a217d793a5 |
cpe:2.3:a:hexpm:hex:*:*:*:*:*:*:*:*
|
|
二、漏洞 CVE-2026-105274 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-105274 其他参考 (4)
IV. Related Vulnerabilities
Same product: rebar3
V. Comments for CVE-2026-105274
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