CVE-2018-1000814

aiohttp-session creates non-expiring sessions

6.5 MediumFix available

aio-libs aiohttp-session version 2.6.0 and earlier contains a Other/Unknown vulnerability in EncryptedCookieStorage and NaClCookieStorage that can result in Non-expiring sessions / Infinite lifespan. This attack appear to be exploitable via Recreation of a cookie post-expiry with the same value.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: Low
User interaction: None

What an attacker can affect

Confidentiality: None
Integrity: High
Availability: None

Exploit likelihood

0.97%Up 0.3 points since Apr 14, 2021

What each source reports

NVD Score used 6.5

Record: CVE-2018-1000814
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
CVSS 2.0: 4.0 MediumAV:N/AC:L/Au:S/C:N/I:P/A:N
Weakness: CWE-613
Updated: 2026-11-02

CVE List No score

Record: CVE-2018-1000814
Updated: 2026-11-02

EUVDEUVD-2018-0001 No score

Record: EUVD-2018-0001
Updated: 2026-11-03

GitHub AdvisoriesGHSA-mr4x-c4v9-x729 7.1

aiohttp-session creates non-expiring sessions

Record: GHSA-mr4x-c4v9-x729
CVSS 4.0: 7.1 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Weakness: CWE-613
Updated: 2026-11-02

OSV 6.5

Record: CVE-2018-1000814
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Updated: 2026-11-02

OSVGHSA-mr4x-c4v9-x729 7.1

aiohttp-session creates non-expiring sessions

Record: GHSA-mr4x-c4v9-x729
CVSS 4.0: 7.1 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Weakness: CWE-613
Updated: 2026-11-02

OSVPYSEC-2018-35 No score

Record: PYSEC-2018-35
Updated: 2026-11-02

Affected products

aio-libs aiohttp session

Affected packages

Affected packages
Package	Affected	Fixed
`aiohttp-session` PyPI	through 2.6.0	2.7.0
`aiohttp-session` PyPI	before 2.7.0, plus listed versions 0.0.10.1.00.1.10.1.20.2.0 Show 19 moreShow less 0.3.00.4.00.5.00.7.00.7.10.8.01.0.01.0.11.1.01.2.01.2.12.0.02.0.12.1.02.2.02.3.02.4.02.5.12.6.0	2.7.0

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

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

In short

CVE-2018-1000814 is a medium vulnerability (CVSS 6.5) in Aio-libs Aiohttp Session, published December 20, 2018. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.97%, the 61st percentile. Fixed in aiohttp-session 2.7.0.