CVE-2019-18899: The apt-cacher-ng package of openSUSE Leap 15.1 runs operations in user owned directory /run/apt-cacher-ng wit

Q: How do I fix CVE-2019-18899?

apt-cacher-ng: upgrade to 3.1-lp151.3.3.1; backports: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Q: Is CVE-2019-18899 being exploited?

CVE-2019-18899 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2019-18899 affect?

CVE-2019-18899 affects apt-cacher-ng, backports. Severity is medium (CVSS 6.2). The apt-cacher-ng package of openSUSE Leap 15.1 runs operations in user owned directory /run/apt-cacher-ng with root privileges. This can allow local attackers to influence the outcome of these operations. This issue affects: openSUSE Leap

Q: How urgent is CVE-2019-18899?

Priority 26/100. No elevated risk signals yet.

Routine

MEDIUM 6.2UPGRADEMITIGATE

CVE-2019-18899 is a medium-severity flaw (CVSS 6.2) affecting apt-cacher-ng, backports. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The apt-cacher-ng package of openSUSE Leap 15.1 runs operations in user owned directory /run/apt-cacher-ng with root privileges. This can allow local attackers to influence the outcome of these operations. This issue affects: openSUSE Leap 15.1 apt-cacher-ng versions prior to 3.1-lp151.3.3.1.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.2 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.3% (top 82%)
CISA exploited list	No
Weakness	CWE-269
Published	2020-01-23
Last modified	2026-06-17

Publisher (CNA): SUSE · Vendor: apt-cacher-ng project · opensuse

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2020-01-23 15:15 UTCPublished CVE record published
2026-06-17 02:25 UTCUpdated Record last modified

apt-cacher-ng project apt-cacher-ng UPGRADE

Affected: < 3.1-lp151.3.3.1

Fixed in: 3.1-lp151.3.3.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy apt-cacher-ng || rpm -q apt-cacher-ng || apt-cacher-ng --version

2. UPGRADE to 3.1-lp151.3.3.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade apt-cacher-ng

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade apt-cacher-ng

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

opensuse backports MITIGATE

Affected: sle-15 sp1

Fixed in: no fixed release known

Safe to downgrade to: a release before sle-15

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2019-18899?

apt-cacher-ng: upgrade to 3.1-lp151.3.3.1; backports: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2019-18899 being exploited?

CVE-2019-18899 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2019-18899 affect?

CVE-2019-18899 affects apt-cacher-ng, backports. Severity is medium (CVSS 6.2). The apt-cacher-ng package of openSUSE Leap 15.1 runs operations in user owned directory /run/apt-cacher-ng with root privileges. This can allow local attackers to influence the outcome of these operations. This issue affects: openSUSE Leap

How urgent is CVE-2019-18899?

Priority 26/100. No elevated risk signals yet.

Related CVEs

CVE-2025-11146 MEDIUM 5.4 DOWNGRADE Reflected Cross-site scripting (XSS) in Apt-Cacher-NG v3.2.1
CVE-2025-11147 MEDIUM 5.4 DOWNGRADE Reflected cross-site scripting (XSS) in Apt-Cacher-NG v3.2.1
CVE-2020-5202 MEDIUM 5.5 UPGRADE MITIGATE apt-cacher-ng through 3.3 allows local users to obtain sensitive information by hijacking the hardcoded TCP po
CVE-2017-7443 MEDIUM 6.1 UPGRADE UPGRADE apt-cacher before 1.7.15 and apt-cacher-ng before 3.4 allow HTTP response splitting via encoded newline charac

References

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