CVE-2026-28428: Talishar is a fan-made Flesh and Blood project

Q: How do I fix CVE-2026-28428?

talishar: upgrade to 2026-02-22. Exact commands for each OS are on this page.

Q: Is CVE-2026-28428 being exploited?

CVE-2026-28428 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-2026-28428 affect?

CVE-2026-28428 affects talishar. Severity is medium (CVSS 5.3). Talishar is a fan-made Flesh and Blood project. Prior to commit a9c218e, an authentication bypass vulnerability in Talishar's game endpoint validation logic allows any unauthenticated attacker to perform authenticated game actions — includi

Q: How urgent is CVE-2026-28428?

Priority 35/100. Public exploit reference; Remotely exploitable, no login, no user action

This week

MEDIUM 5.3REMOTEUPGRADE

CVE-2026-28428 is a medium-severity flaw (CVSS 5.3) affecting talishar. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Talishar is a fan-made Flesh and Blood project. Prior to commit a9c218e, an authentication bypass vulnerability in Talishar's game endpoint validation logic allows any unauthenticated attacker to perform authenticated game actions — including sending chat messages and submitting game inputs — by supplying an empty authKey parameter (authKey=). The server-side validation uses a loose comparison that accepts an empty string as a valid credential, w

Why this priority

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

A fixed release or distro patch exists.

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.3% (top 75%)
CISA exploited list	No
Weakness	CWE-287
Published	2026-03-06
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: talishar

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

Am I affected?

Timeline

2026-03-06 05:16 UTCPublished CVE record published
2026-06-17 10:28 UTCUpdated Record last modified

talishar talishar UPGRADE

Affected: < 2026-02-22

Fixed in: 2026-02-22

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 2026-02-22 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade talishar

Note

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

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-2026-28428?

talishar: upgrade to 2026-02-22. Exact commands for each OS are on this page.

Is CVE-2026-28428 being exploited?

CVE-2026-28428 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-2026-28428 affect?

CVE-2026-28428 affects talishar. Severity is medium (CVSS 5.3). Talishar is a fan-made Flesh and Blood project. Prior to commit a9c218e, an authentication bypass vulnerability in Talishar's game endpoint validation logic allows any unauthenticated attacker to perform authenticated game actions — includi

How urgent is CVE-2026-28428?

Priority 35/100. Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2026-28429 HIGH 7.5 UPGRADE Talishar is a fan-made Flesh and Blood project
CVE-2026-27632 LOW 2.6 UPGRADE Talishar is a fan-made Flesh and Blood project

References

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