CVE-2026-5080: Dancer::Session::Abstract versions through 1.3522 for Perl generates session ids insecurely. The session id i

Q: How do I fix CVE-2026-5080?

dancer\: upgrade to newer than 1.3522. Exact commands for each OS are on this page.

Q: Is CVE-2026-5080 being exploited?

CVE-2026-5080 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-2026-5080 affect?

CVE-2026-5080 affects dancer\. Severity is medium (CVSS 5.9). Dancer::Session::Abstract versions through 1.3522 for Perl generates session ids insecurely. The session id is generated from summing the character codepoints of the absolute pathname with the process id, the epoch time and calls to the bu

Q: How urgent is CVE-2026-5080?

Priority 33/100. Remotely exploitable, no login, no user action

Routine

MEDIUM 5.9REMOTEUPGRADE

CVE-2026-5080 is a medium-severity flaw (CVSS 5.9) affecting dancer\. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Dancer::Session::Abstract versions through 1.3522 for Perl generates session ids insecurely. The session id is generated from summing the character codepoints of the absolute pathname with the process id, the epoch time and calls to the built-in rand() function to return a number between 0 and 999-billion, and concatenating that result three times. The path name might be known or guessed by an attacker, especially for applications known to be w

Why this priority

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	0.4% (top 70%)
CISA exploited list	No
Weakness	CWE-338, CWE-340
Published	2026-04-30
Last modified	2026-10-26

Publisher (CNA): CPANSec · Vendor: perldancer

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-30 12:16 UTCPublished CVE record published
2026-10-26 21:10 UTCUpdated Record last modified

perldancer dancer\ UPGRADE

Affected: <= 1.3522

Fixed in: newer than 1.3522

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 1.3522 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade dancer

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-2026-5080?

dancer\: upgrade to newer than 1.3522. Exact commands for each OS are on this page.

Is CVE-2026-5080 being exploited?

CVE-2026-5080 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-2026-5080 affect?

CVE-2026-5080 affects dancer\. Severity is medium (CVSS 5.9). Dancer::Session::Abstract versions through 1.3522 for Perl generates session ids insecurely. The session id is generated from summing the character codepoints of the absolute pathname with the process id, the epoch time and calls to the bu

How urgent is CVE-2026-5080?

Priority 33/100. Remotely exploitable, no login, no user action

Software pages

Perl vulnerabilities

References

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