CVE-2026-48595: Improper Handling of Case Sensitivity vulnerability in elixir-tesla tesla allows credential leakage to a third

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MEDIUM 5.9REMOTEUPGRADE

CVE-2026-48595 is a medium-severity flaw (CVSS 5.9) affecting tesla. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Improper Handling of Case Sensitivity vulnerability in elixir-tesla tesla allows credential leakage to a third-party origin on cross-origin redirects. Tesla.Middleware.FollowRedirects strips security-sensitive headers on cross-origin redirects using a case-sensitive string comparison against a lowercase filter list (@filter_headers ["authorization", "host"]). HTTP header names are case-insensitive per RFC 7230, but Tesla preserves header keys ve

Why this priority

Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	5.9 (Medium)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	0.5% (top 58%)
CISA exploited list	No
Weakness	CWE-178
Published	2026-06-02
Last modified	2026-09-24

Publisher (CNA): EEF · Vendor: elixir-tesla

Last updated 2026-09-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-02 20:16 UTCPublished CVE record published
2026-09-24 21:17 UTCUpdated Record last modified

elixir-tesla tesla UPGRADE

Affected: >= 1.4.0 and < 1.18.3

Fixed in: 1.18.3

Safe to downgrade to: a release before 1.4.0

1. Check installed version

apt-cache policy tesla || rpm -q tesla || tesla --version

2. UPGRADE to 1.18.3 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade tesla

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade tesla

Note

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

3. If no update is available yet, DOWNGRADE to a release before 1.4.0 (Debian / Ubuntu)

apt-cache madison tesla sudo apt install tesla=<VERSION_BEFORE_1.4.0> sudo apt-mark hold tesla

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list tesla sudo dnf downgrade tesla-<VERSION_BEFORE_1.4.0> sudo dnf versionlock add tesla

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2026-48595?

tesla: upgrade to 1.18.3. Exact commands for each OS are on this page.

Is CVE-2026-48595 being exploited?

CVE-2026-48595 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-2026-48595 affect?

CVE-2026-48595 affects tesla. Severity is medium (CVSS 5.9). Improper Handling of Case Sensitivity vulnerability in elixir-tesla tesla allows credential leakage to a third-party origin on cross-origin redirects. Tesla.Middleware.FollowRedirects strips security-sensitive headers on cross-origin redir

How urgent is CVE-2026-48595?

Priority 41/100. Public exploit reference; Remotely exploitable, no login, no user action

Software pages

Tesla and automotive vulnerabilities

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CVE-2026-48596 LOW 3.7 UPGRADE Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting') vulnerability in
CVE-2026-48594 HIGH 7.5 UPGRADE Improper Handling of Highly Compressed Data (Data Amplification) vulnerability in elixir-tesla tesla allows a

References

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