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CVE-2023-28119

19
FAUCET Score

CVE-2023-28119 affects the crewjam/saml Go library, specifically versions prior to 0.4.13, due to an unbounded input size vulnerability in its flate.NewReader implementation. An unauthenticated attacker can send oversized, compressed HTTP requests, causing the server to decompress large amounts of data and leading to a denial-of-service (DoS) by crashing the process. This vulnerability is rated High severity (CVSS 7.5) with a low attack complexity and no user interaction required, but there is currently no evidence of active exploitation, public exploit code, or significant community discussion.

Impacted Technologies

VendorProductVersion(s)CPE
0.4.12CPE matchmatch criteria
cpe:2.3:a:saml_project:saml:0.4.12:*:*:*:*:go:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.96%
Probability of exploitation in next 30 days
EPSS Percentile
57.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0096 is in the 32nd percentile among its peer group of 51,506 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

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

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
gopatch availablevia ghsa
Product: github.com/crewjam/samlFixed in: 0.4.13

Vendor Advisories (2)

goGHSA-5mqj-xc49-246phigh

crewjam/saml vulnerable to Denial Of Service Via Deflate Decompression Bomb

Mar 22, 2023
redhatCVE-2023-28119Moderate

crewjam/saml: Denial Of Service Via Deflate Decompression Bomb

Mar 22, 2023

References

github.com / crewjam/saml/commit/8e9236867d176ad6338c870a84e2039aef8a5021
Patch
github.com / crewjam/saml/security/advisories/GHSA-5mqj-xc49-246p
Vendor Advisory