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CVE-2025-63811

24
FAUCET Score

CVE-2025-63811 describes a Denial-of-Service (DoS) vulnerability in dvsekhvalnov jose2go versions 1.5.0 through 1.7.0. An unauthenticated attacker can exploit this by submitting a specially crafted JSON Web Encryption (JWE) token with an extremely high compression ratio, leading to resource exhaustion. This vulnerability carries a CVSS score of 7.5 (High), indicating a network-exploitable issue with low attack complexity and high impact on availability. Currently, there is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 1.5.0, < 1.7.0CPE matchmatch criteria
cpe:2.3:a:dvsekhvalnov:jose2go:*:*:*:*:*: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
0.25%
Probability of exploitation in next 30 days
EPSS Percentile
16.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0025 is in the 2nd percentile among its peer group of 51,551 CVEs.

Social Chatter

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)

gopatch availablevia ghsa
Product: github.com/dvsekhvalnov/jose2goFixed in: 1.7.0
github_advisoryworkaround availablevia nvd_reference
View patch

Vendor Advisories (1)

goGHSA-9mj6-hxhv-w67jhigh

jose2go is vulnerable to a JWT bomb attack through its decode function

Nov 12, 2025

References

github.com / dvsekhvalnov/jose2go/issues/33
ExploitIssue TrackingMitigation