CVE-2026-55888

LOWCVSS 8.8 · HIGH

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD description

XDG Desktop Portal is a desktop integration portal. Prior to version 1.22.1, malicious sandboxed applications can use the FileChooser.SaveFiles method to gain arbitrary file access to non-existing files on the host (limited to files the user has access to). The FileChooser.SaveFiles method takes optional filenames which get appended to the selected directory by backends. The backends are supposed to check that the file does not exist yet. The filenames are not validated by the frontend and also not by common backends. This issue has been patched in version 1.22.1.

0.0/ 10 priority

Sources & remediation

Weakness type (CWE)
CWE-22

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

NONE

Threat summary

  • 1 mentions across 1 observed day

What's happening

  • 1 total mentions across 1 day

Deep dive

Activity timeline1 mentions / 1d
00111Mentions · 2026-11-01: 111-01
Full discourse1 post
  • m.shiono@shioccii

    【Linux 直近1ヶ月のHigh脆弱性まとめ(10/2〜11/2)】
※公式情報で確認できた分のみ。全件網羅ではありません ■カーネル
・Fragnesia(XFRM ESP-in-TCP)/ ローカル権限昇格 / CVE-2026-46300 / CVSS 7.8 / CISA KEVに10/28追加(悪用確認済み)
・smbクライアントのヒープオーバーフロー / CVE-2026-99110 / CVSS 7.8
・net/schedのUse-After-Free / CVE-2026-99167 / CVSS 7.8
・pfcpのSEID境界外読み取り / CVE-2026-98952 / CVSS 7.5
・TCP(IPv4)のUse-After-Free / CVE-2026-98432 / CVSS 9.8(カーネルCNA評価はCritical。Red Hatは8.1または5.9と評価が割れている。) ■ユーザーランド(Red Hat公式 10/23〜10/27公開分のみ確認)
・xdg-desktop-portal ファイルアクセス不備 / CVE-2026-55888 / CVSS 8.2
・Samba アクセス制御バイパス / CVE-2026-109411 / CVSS 8.1
・WebKit2GTK 任意コード実行 / CVE-2026-112655 / CVSS 8.8
・libgsf ヒープオーバーフロー / CVE-2026-116124 / CVSS 7.8
・ImageMagick(RHEL 6/7のみ)メモリ破壊 / CVE-2026-116149 / CVSS 7.8
・libimobiledevice double free / CVE-2026-116260 / CVSS 7.3
・rapidjson 境界外読み取りDoS / CVE-2026-116620 / CVSS 7.5
・fltk BMP処理で任意コード実行 / CVE-2026-116723・CVE-2026-116724 / CVSS 7.8 出典:Red Hat Customer Portal、CISA KEV

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