Page generated: 06 Nov 2026, 03:50 UTC
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CVE-2026-109518

On Debian, Ubuntu, and derivative Linux distributions, an on-path attacker who can manipulate the HTTP traffic (including a malicious mirror or proxy) between an APT client and an archive server triggered by a package install can trick the client into installing an attacker-contr…

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On Debian, Ubuntu, and derivative Linux distributions, an on-path attacker who can manipulate the HTTP traffic (including a malicious mirror or proxy) between an APT client and an archive server triggered by a package install can trick the client into installing an attacker-controlled unverified package and achieve remote code execution with root privileges. The vulnerability is caused by the reuse of hard links and requires the client to follow redirects and retry the download of package files. It requires the client to have a non-zero Acquire::Retries configuration setting; the value 3 is the default starting with Debian 12 (bookworm) and Ubuntu 22.04 LTS (Jammy Jellyfish), so older releases are unaffected in a default configuration
CVSS 7.7 (HIGH)

Attention and evidence

HYPE SCORE
0.6/10
REALITY · THREAT PRIORITY
2.7/10
General review priority; not probability

Evidence confidence: Insufficient evidence

Why this priority?
  • Technical severity: CVSS 7.7: +2.69
  • Fresh EPSS: 0.93%: +0.02

General review priority, not probability, victim count or asset-specific risk. A range covers missing CVSS/EPSS inputs within the current evidence state.

Sources: 1 documents and public datasets.

Hype components

Headline sample (25%)
10/100
Press, 30 days (60%)
5/100
Grounded branding (15%)
0/100
HYPE TOTAL6/100

Sources and documents

CSO Online
Press · 05 Nov 2026, 12:20 · Debian, Ubuntu patch APT flaw that could hand attackers root

Score evolution

● Hype   ● Reality

0.01.02.03.04.05.004 Nov 2026 · INSUFFICIENT DATAHype 0.0Reality 2.705 Nov 2026 · INSUFFICIENT DATAHype 1.8Reality 2.705 Nov 2026 · INSUFFICIENT DATAHype 0.6Reality 2.705 Nov 2026 · BELOW THRESHOLDSHype 0.6Reality 2.705 Nov 2026 · BELOW THRESHOLDSHype 1.6Reality 2.705 Nov 2026 · BELOW THRESHOLDSHype 0.6Reality 2.705 Nov 2026 · BELOW THRESHOLDSHype 1.6Reality 2.705 Nov 2026 · BELOW THRESHOLDSHype 0.6Reality 2.705 Nov 2026 · BELOW THRESHOLDSHype 1.1Reality 2.705 Nov 2026 · BELOW THRESHOLDSHype 0.6Reality 2.705 Nov 2026 · BELOW THRESHOLDSHype 1.6Reality 2.705 Nov 2026 · BELOW THRESHOLDSHype 0.6Reality 2.705 Nov 2026 · BELOW THRESHOLDSHype 1.3Reality 2.705 Nov 2026 · BELOW THRESHOLDSHype 0.6Reality 2.7Nov 4Nov 5Nov 5Nov 5Nov 5Nov 5Nov 5Nov 5

━ Hype Score (Perceived)  ━ Reality threat priority. Definition changes are not new attacks.

Public exploit evidence

0

Public exploit entries / repo candidates

Evidence context and dated references

Reality is general threat/review priority, combining observed exploitation, CVSS severity and fresh EPSS. Evidence confidence is separate. This is not calibrated risk, a victim count or an asset-specific assessment. A range reflects missing numeric inputs. Published 1 days ago. Exploitation evidence usually takes weeks to show up: a low reality score can mean there is no data yet, not that the flaw is mild.

Evidence in context

Confidence in exploitation evidence
Insufficient evidence
Priority basis
Exploitation in attacks unconfirmed; CVSS 7.7; EPSS 0.9%
Attention, last 30 days
1 distinct story titles; 1 press documents; 1 publisher domains.
Technical potential
network access, no prior privileges, passive user interaction, additional attack conditions.
Observed activity
No exploitation observation is recorded.
Known scale
Not quantified.
Evidence confidence basis
Insufficient evidence

Score evaluated: 2026-11-05 22:55:45.722637+00:00 · EPSS snapshot: 2026-11-05T12:03:04Z

Source event timeline
Published
04 Nov 2026, 15:49
First press mention
05 Nov 2026, 12:20
Latest press mention
05 Nov 2026, 12:20
Score calculated
05 Nov 2026, 22:55