Security readout for executives and security teams
Plain-English summary
This CVE describes a denial-of-service risk in Pure-JavaScript-HTML5-Parser caused by vulnerable regular expressions. An unauthenticated remote attacker may be able to trigger excessive processing by supplying crafted input, affecting availability. The provided bundle says no patch was known at publication time.
Executive priority
Prioritize systems that parse public input or external content. The main business risk is service disruption, not data theft, based on the provided evidence.
Technical view
The issue is classified as CWE-1333 ReDoS. CVSS 4.0 score is 8.7 with network access, low complexity, no privileges, and high availability impact. The source bundle contains conflicting text naming Validate.js, while the title, affected product, and references point to Pure-JavaScript-HTML5-Parser.
Likely exposure
Exposure is most likely where applications use blowsie Pure-JavaScript-HTML5-Parser to process untrusted or attacker-controlled HTML or similar input. Confirm dependency presence directly because the affected version metadata is sparse and inconsistent.
Exploitation context
The bundle does not show CISA KEV listing or cited evidence of active exploitation. Treat this as plausible availability risk, not confirmed in-the-wild exploitation.
Researcher notes
Evidence is incomplete: patch status is unknown, version data is minimal, and the description conflicts with the affected product name. Validate the package identity before filing remediation work.
Mitigation direction
- Check the linked advisory and issue for current vendor guidance.
- Inventory applications using Pure-JavaScript-HTML5-Parser.
- Avoid parsing untrusted input with the affected component where practical.
- Apply a vendor fix if one is available.
- Consider replacing unsupported vulnerable dependencies after risk review.
Validation and detection
- Search dependency manifests and lockfiles for Pure-JavaScript-HTML5-Parser.
- Identify routes or jobs that parse external HTML input.
- Confirm whether those paths are reachable without authentication.
- Review runtime monitoring for CPU exhaustion or request timeouts.
- Document compensating controls if no patch is available.
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
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CWE-1333: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2020-26310 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 8.7 (4.0)
- Known Exploited
- No
- Published
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/U:Green
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/U:Green——Primary CVE scoreVulnerability scoring details
Base CVSS 4.0 score
8.7HighVector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/U:Green
Source materials
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Inefficient Regular Expression Complexity
Inefficient Regular Expression Complexity represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.