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© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2023-29019

25
FAUCET Score

CVE-2023-29019 is a session fixation vulnerability affecting applications using @fastify/passport for authentication in conjunction with @fastify/session. Attackers can exploit this by providing a valid sessionId cookie to a victim, which then becomes an authenticated session upon the victim's login. This vulnerability carries a CVSS score of 8.1 (HIGH), indicating a network attack vector, low attack complexity, and high impact on confidentiality and integrity. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.1.0CPE matchmatch criteria
cpe:2.3:a:fastify:passport:*:*:*:*:*:node.js:*:*
>= 2.0.0, < 2.3.0CPE matchmatch criteria
cpe:2.3:a:fastify:passport:*:*:*:*:*:node.js:*:*

CVSS Data

CVSS version used by this source: 3.1

8.1HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
5.2
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.75%
Probability of exploitation in next 30 days
EPSS Percentile
51.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0075 is in the 53rd percentile among its peer group of 14,848 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.1 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

github_advisorypatch availablevia nvd_reference
View patch
npmpatch availablevia ghsa
Product: @fastify/passportFixed in: 1.1.0
npmpatch availablevia ghsa
Product: @fastify/passportFixed in: 2.3.0

Vendor Advisories (1)

npmGHSA-4m3m-ppvx-xgw9high

Session fixation in fastify-passport

Apr 21, 2023

References

github.com / fastify/fastify-passport/commit/43c82c321db58ea3e375dd475de60befbfcf2a11
Patch
github.com / fastify/fastify-passport/security/advisories/GHSA-4m3m-ppvx-xgw9
Vendor Advisory
owasp.org / www-community/attacks/Session_fixation
Technical Description