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CVE-2026-79313

webpy web.py 0.76 is vulnerable to Insufficient Session Expiration. The application's session...

9.8 Critical

webpy web.py 0.76 is vulnerable to Insufficient Session Expiration. The application's session management relies on periodic cleanup to expire sessions instead of checking the last-access time when a session is loaded. As a result, an expired session whose record has not yet been cleaned up can still be replayed and used, allowing an attacker holding a previously valid session cookie to continue accessing protected resources after the configured idle timeout.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
High

Exploit likelihood

0.38%Down 0.2 points since Sep 23, 2026
90%50%10%1%

What each source reports

CVE List Score used 9.8

webpy web.py 0.76 is vulnerable to Insufficient Session Expiration. The application's session management relies on periodic cleanup to expire sessions instead of checking the last-access time when a session is loaded. As a result, an expired session whose record has not yet been cleaned up can still be replayed and used, allowing an attacker holding a previously valid session cookie to continue accessing protected resources after the configured idle timeout.

Record
CVE-2026-79313
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-613
Updated
2026-11-02
EUVDEUVD-2026-84490 9.8

webpy web.py 0.76 is vulnerable to Insufficient Session Expiration. The application's session management relies on periodic cleanup to expire sessions instead of checking the last-access time when a session is loaded. As a result, an expired session whose record has not yet been cleaned up can still be replayed and used, allowing an attacker holding a previously valid session cookie to continue accessing protected resources after the configured idle timeout.

Record
EUVD-2026-84490
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
GitHub AdvisoriesGHSA-qxcc-j254-vh2v 9.8

webpy web.py 0.76 is vulnerable to Insufficient Session Expiration. The application's session...

webpy web.py 0.76 is vulnerable to Insufficient Session Expiration. The application's session management relies on periodic cleanup to expire sessions instead of checking the last-access time when a session is loaded. As a result, an expired session whose record has not yet been cleaned up can still be replayed and used, allowing an attacker holding a previously valid session cookie to continue accessing protected resources after the configured idle timeout.

Record
GHSA-qxcc-j254-vh2v
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-613
Updated
2026-11-02
NVD 9.8

webpy web.py 0.76 is vulnerable to Insufficient Session Expiration. The application's session management relies on periodic cleanup to expire sessions instead of checking the last-access time when a session is loaded. As a result, an expired session whose record has not yet been cleaned up can still be replayed and used, allowing an attacker holding a previously valid session cookie to continue accessing protected resources after the configured idle timeout.

Record
CVE-2026-79313
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-613
Updated
2026-11-02
OSVDEBIAN-CVE-2026-79313 9.8

webpy web.py 0.76 is vulnerable to Insufficient Session Expiration. The application's session management relies on periodic cleanup to expire sessions instead of checking the last-access time when a session is loaded. As a result, an expired session whose record has not yet been cleaned up can still be replayed and used, allowing an attacker holding a previously valid session cookie to continue accessing protected resources after the configured idle timeout.

Record
DEBIAN-CVE-2026-79313
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2026-79313 9.8

webpy web.py 0.76 is vulnerable to Insufficient Session Expiration. The application's session management relies on periodic cleanup to expire sessions instead of checking the last-access time when a session is loaded. As a result, an expired session whose record has not yet been cleaned up can still be replayed and used, allowing an attacker holding a previously valid session cookie to continue accessing protected resources after the configured idle timeout.

Record
UBUNTU-CVE-2026-79313
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02

Affected packages

Affected packages
PackageAffectedFixed
webpy
Debian:12
All versions, plus listed versions
1:0.62-41:0.62-4+deb12u11:0.62-51:0.62-61:0.70-11:0.76-1
None known
webpy
Debian:13
All versions, plus listed versions
1:0.62-61:0.70-11:0.76-1
None known
webpy
Debian:14
All versions, plus listed versions
1:0.62-61:0.70-11:0.76-1
None known
webpy
Ubuntu:Pro:16.04:LTS
All versions, plus listed versions
1:0.37+20120626-11:0.37+20120626-1ubuntu0.1~esm1
None known
webpy
Ubuntu:Pro:18.04:LTS
All versions, plus listed versions
1:0.38-11:0.38+20170615-11:0.38+20170615-1ubuntu0.1~esm1
None known
webpy
Ubuntu:Pro:20.04:LTS
All versions, plus listed versions
1:0.39+20181101-11:0.40-21:0.40-2ubuntu0.1~esm1
None known
webpy
Ubuntu:Pro:22.04:LTS
All versions, plus listed versions
1:0.61-11:0.61-1ubuntu0.1~esm1
None known
webpy
Ubuntu:Pro:24.04:LTS
All versions, plus listed versions
1:0.62-41:0.62-4ubuntu0.1~esm1
None known
webpy
Ubuntu:26.10
All versions, plus listed versions
1:0.62-61:0.70-11:0.76-1
None known
webpy
Ubuntu:26.04:LTS
All versions, plus listed versions
1:0.62-6
None known

History

History
RecordedChangedSources
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-79313 is a critical vulnerability (CVSS 9.8) in webpy, published September 22, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.38%, the 32nd percentile. No source names a fixed version.

References

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