CVE-2026-115754

MEDIUMPre-NVD 4.74.7
EchelonGraph scoreHIGH confidence

“—” beside the score: it is equal to the CVSS score beside it.

Score 4.7 from GitHub Security Advisory (severity: LOW) published 2026-10-23. A secondary CVSS source baseline 4.7; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source

Also known asEUVD-2026-108967 (ENISA EUVD) · GHSA-cvqw-cqhx-qmxc (GitHub Security Advisories)Source: ENISA EUVD

4.7EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 4.7Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

serialize-javascript from 7.0.1 before 7.1.3 contains a cross-site scripting vulnerability that allows attackers to break out of HTML script elements by ending serialized function source text with an unescaped

CVSS v3
4.7
EG Score
4.7MEDIUMhigh confidence
EG Risk
21
EG Risk 21/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity47% × 45%
Impact severity (EG Severity): CVSS 4.7 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.2% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.2%
EPSS %ILE
14th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (4.7): severity, escalated by confirmed exploitation. This CVE's 4.7 is its impact severity (EG Severity), not escalated.

EG Severity
4.7 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.2% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-10). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at every mission impact level.CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

October 23, 2026

Last Modified

October 23, 2026

Advisory Details (5)

Auto-updated Oct 23, 2026
Patch available. Sources: github, github_pr, github_commit, github_release.
Web page

serialize-javascript 7.0.1 before 7.1.3 XSS via unescaped </script in function body | Advisories | VulnCheck

https://www.vulncheck.com/advisories/serialize-javascript-7.0.1-before-7.1.3-xss-via-unescaped-script-in-function-body
GitHub release Patch Available

v7.1.3

Patch available: yahoo/serialize-javascript v7.1.3

https://github.com/yahoo/serialize-javascript/releases/tag/v7.1.3
GitHub commit Patch Available

commit 2864b3c6260a (yahoo/serialize-javascript)

Patch available: yahoo/serialize-javascript v7.1.3 (contains commit 2864b3c6260a)

https://github.com/yahoo/serialize-javascript/commit/2864b3c6260a3bfd52d2db3e70d1a079de108a61
GitHub pull request Patch Available

fix: escape `</script` at the end of a serialized function body

Patch available: yahoo/serialize-javascript v7.1.3 (PR #235 merged 2026-10-22)

https://github.com/yahoo/serialize-javascript/pull/235
GitHub advisoryMentions a patch (unverified)

Cross-site scripting (XSS) via unescaped </script at the end of a serialized function body · Advisory · yahoo/serialize-javascript · GitHub

https://github.com/yahoo/serialize-javascript/security/advisories/GHSA-m5mm-p8h7-m29v

Patch Availability(1)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatgrafana12-4-main-12.4.13-0.6.hum12026-11-02redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
node-serialize-javascript6.0.0-2 ... 7.1.4+~5.0.4-1 (9 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
node-serialize-javascript6.0.2-1 ... 7.1.4+~5.0.4-1 (6 versions)
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
node-serialize-javascript6.0.2-1, 7.0.4+~5.0.4-1, 7.0.5+~5.0.4-1, 7.0.7+~5.0.4-1, 7.1.2+~5.0.4-1
  • every version up to 7.1.4+~5.0.4-1: fixed in 7.1.4+~5.0.4-1
—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 9× in last 7d / 29× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed its CVE.org record (CNA or CISA ADP). An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). "EchelonGraph re-scored" is our own recompute of this CVE's score, not an update from a source, and is not counted in the refreshes above. Most recent first.

  1. 2026-11-13 16:50 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  2. 2026-11-12 16:33 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  3. 2026-11-11 16:38 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  4. 2026-11-11 06:51 UTCEchelonGraph re-scored
  5. 2026-11-11 06:51 UTCVendor advisory
  6. 2026-11-11 06:51 UTCGHSA enrichmentGHSA-cvqw-cqhx-qmxc · GitHub severity LOW · GitHub CVSS 4.7
  7. 2026-11-10 16:42 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  8. 2026-11-09 16:34 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  9. 2026-11-08 16:38 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  10. 2026-11-07 16:38 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  11. 2026-11-06 16:36 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  12. 2026-11-05 16:36 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  13. 2026-11-04 16:34 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  14. 2026-11-04 01:45 UTCEchelonGraph re-scored
  15. 2026-11-04 01:45 UTCVendor advisory
  16. 2026-11-04 01:45 UTCGHSA enrichmentGHSA-cvqw-cqhx-qmxc · GitHub severity LOW · GitHub CVSS 4.7
  17. 2026-11-03 16:46 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  18. 2026-11-02 16:44 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  19. 2026-11-01 16:33 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  20. 2026-10-31 16:32 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  21. 2026-10-30 16:33 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  22. 2026-10-29 16:32 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  23. 2026-10-29 15:15 UTCEchelonGraph re-scored
  24. 2026-10-29 15:15 UTCVendor advisory
  25. 2026-10-29 15:15 UTCGHSA enrichmentGHSA-cvqw-cqhx-qmxc · GitHub severity LOW · GitHub CVSS 4.7
Show 13 more
  1. 2026-10-28 16:31 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  2. 2026-10-27 16:31 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  3. 2026-10-26 16:30 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  4. 2026-10-25 16:32 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  5. 2026-10-25 14:50 UTCEchelonGraph re-scored
  6. 2026-10-24 16:32 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  7. 2026-10-23 19:50 UTCEchelonGraph re-scored
  8. 2026-10-23 19:50 UTCGHSA enrichmentGHSA-cvqw-cqhx-qmxc · GitHub severity LOW · GitHub CVSS 4.7
  9. 2026-10-23 15:28 UTCEchelonGraph re-scored
  10. 2026-10-23 15:03 UTCEchelonGraph re-scored
  11. 2026-10-23 14:28 UTCEchelonGraph re-scored
  12. 2026-10-23 13:27 UTCEchelonGraph re-scoredFirst assessed: 4.7 MEDIUM
  13. 2026-10-23 13:24 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-115754?
CVE-2026-115754 is a medium-severity vulnerability; its CVE record was published on October 23, 2026. serialize-javascript from 7.0.1 before 7.1.3 contains a cross-site scripting vulnerability that allows attackers to break out of HTML script elements by ending serialized function source text with an unescaped </script. Attackers controlling a function's source via a spoofed toString() can combine…
When was CVE-2026-115754 made public?
CVE-2026-115754 was made public on October 22, 2026: that is the date its CVE record's CNA, VulnCheck, gives for when the vulnerability was made public. The CVE record itself was published on October 23, 2026. EchelonGraph's copy of the record carries a last-modified date of October 23, 2026; the record at its source may have been updated since.
Is CVE-2026-115754 actively exploited?
CVE-2026-115754 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (14th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-115754?
CVE-2026-115754 has a CVSS base score of 4.7 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-115754?
A fix for CVE-2026-115754 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-115754 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-115754

Explore →

Is Your Infrastructure Affected by CVE-2026-115754?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.