aio-libs aiohttp-session up to 2.6.0 EncryptedCookieStorage/NaClCookieStorage Cookie session expiration

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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A vulnerability has been found in aio-libs aiohttp-session up to 2.6.0 and classified as critical. This vulnerability affects the function EncryptedCookieStorage/NaClCookieStorage. The manipulation as part of a Cookie leads to a session expiration vulnerability. The CWE definition for the vulnerability is CWE-613. According to WASC, "Insufficient Session Expiration is when a web site permits an attacker to reuse old session credentials or session IDs for authorization." As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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.

The bug was discovered 10/09/2018. The weakness was released 12/20/2018 (Website). The advisory is available at This vulnerability was named CVE-2018-1000814 since 12/20/2018. The exploitation appears to be easy. The attack can be initiated remotely. A single authentication is needed for exploitation. Technical details are known, but there is no available exploit.

The vulnerability was handled as a non-public zero-day exploit for at least 72 days. During that time the estimated underground price was around $0-$5k.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.




CPE 2.3info

CPE 2.2info


VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.4

VulDB Base Score: 6.3
VulDB Temp Score: 6.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.5
NVD Vector: 🔍



VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍


Class: Session expiration
CWE: CWE-613
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍


Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍


Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍



10/09/2018 🔍
12/20/2018 +72 days 🔍
12/20/2018 +0 days 🔍
12/20/2018 +0 days 🔍
12/21/2018 +1 days 🔍
06/20/2023 +1642 days 🔍


Advisory: 325
Status: Not defined

CVE: CVE-2018-1000814 (🔍)


Created: 12/21/2018 07:58 AM
Updated: 06/20/2023 08:07 AM
Changes: 12/21/2018 07:58 AM (58), 04/22/2020 10:08 AM (1), 06/20/2023 08:07 AM (4)
Complete: 🔍


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