VulnerabilityPublished 9 Jun 2026Updated 27 Jun 2026

CVE-2026-41848: Spring Framework · ReDoS

Affects Spring FrameworkSource CVE Database V5

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Not known to be exploited · CVSS 3.7 Low · fixed in 7.0.7.1 : update Spring Framework when convenient.

Data as of 30 Oct 2026, 11:52 UTC

CVSS 3.1 base score

3.7Low

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.3% chance of exploitation in 30 days – higher than 26% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 7.0.7.1, 6.2.18.1, 6.1.28 +1

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

Attack Vector: Network
Attack Complexity: High
Privileges Required: None
User Interaction: None
Scope: Unchanged
Confidentiality: None
Integrity: None
Availability: Low

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, up to and including the entire Internet. Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: High: A successful attack depends on conditions beyond the attacker's control. That is, a successful attack cannot be accomplished at will, but requires the attacker to invest in some measurable amount of effort in preparation or execution against the vulnerable component before a successful attack can be expected. For example, a successful attack may require an attacker to: gather knowledge about the environment in which the vulnerable target/component exists; prepare the target environment to improve exploit reliability; or inject themselves into the logical network path between the target and the resource requested by the victim in order to read and/or modify network communications (e.g., a man in the middle attack).
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files to carry out an attack.
User Interaction: None: The vulnerable system can be exploited without any interaction from any user.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: None: There is no loss of confidentiality within the impacted component.
Integrity: None: There is no loss of integrity within the impacted component.
Availability: Low: Performance is reduced or there are interruptions in resource availability. Even if repeated exploitation of the vulnerability is possible, the attacker does not have the ability to completely deny service to legitimate users. The resources in the impacted component are either partially available all of the time, or fully available only some of the time, but overall there is no direct, serious consequence to the impacted component.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 9 Jun 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade Spring Framework to 7.0.7.1, 6.2.18.1, 6.1.28 or 5.3.49.

Affected software

Product	Affected	Fixed in
SpringSpring Framework	Affected >=7.0.0 <7.0.7.1	Fixed in 7.0.7.1
SpringSpring Framework	Affected >=6.2.0 <6.2.18.1	Fixed in 6.2.18.1
SpringSpring Framework	Affected >=6.1.0 <6.1.28	Fixed in 6.1.28
SpringSpring Framework	Affected >=5.3.0 <5.3.49	Fixed in 5.3.49

AI-suggested

If you cannot patch yet, consider restricting or validating input patterns supplied to AntPathMatcher methods to reduce the risk of ReDoS.

Description

A Regular Expression Denial of Service (ReDoS) vulnerability exists in the Spring Framework's AntPathMatcher component. This affects versions 7.0.0 through 7.0.7, 6.2.0 through 6.2.18, 6.1.0 through 6.1.27, and 5.3.0 through 5.3.48. The vulnerability arises when an attacker can supply a crafted pattern to certain AntPathMatcher methods, potentially causing inefficient regular expression processing and denial of service. The CVSS score is 3.7, indicating low severity.

Impact

The impact is limited to a potential denial of service via resource exhaustion caused by inefficient regular expression evaluation in the affected AntPathMatcher methods. There is no impact on confidentiality or integrity. The low CVSS score (3.7) reflects this limited impact. No known exploitation in the wild has been reported.

Summary

CVE-2026-41848 describes a vulnerability in the Spring Framework's AntPathMatcher where inefficient regular expression complexity can lead to a denial of service condition. Specifically, if an attacker can provide a pattern to the methods match(String pattern, String path), matchStart(String pattern, String path), or extractUriTemplateVariables(String pattern, String path), the application may experience excessive processing time due to the complexity of the regex evaluation. This affects multiple Spring Framework versions: 7.0.0 through 7.0.7, 6.2.0 through 6.2.18, 6.1.0 through 6.1.27, and 5.3.0 through 5.3.48. The vulnerability has a low CVSS score of 3.7, reflecting a low impact on confidentiality, integrity, and a limited impact on availability.

CWE-1333Inefficient Regular Expression Complexity (opens in a new tab)
Base weaknessLikelihood of exploit: High
The product uses a regular expression with a worst-case computational complexity that is inefficient and possibly exponential.
Architecture and Design
Use regular expressions that do not support backtracking, e.g. by removing nested quantifiers.
System Configuration
Set backtracking limits in the configuration of the regular expression implementation, such as PHP's pcre.backtrack_limit. Also consider limits on execution time for the process.
Implementation
Do not use regular expressions with untrusted input. If regular expressions must be used, avoid using backtracking in the expression.
OWASP Cheat Sheets
File Upload (opens in a new tab)
OWASP ASVS 4.0.3
V12.1.1 (opens in a new tab)
Attack patterns
Regular Expression Exponential Blowup (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

spring.io/security/cve-2026-41848 (opens in a new tab)

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 31 Jul 2026, 00:18 UTC

WeaknessesCWE-1333

Technical details

References

Community reviews

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