A flaw was found in gcc. An attacker could cause a Denial of Service (DoS) by passing a string that is not null-terminated to the std::from_chars() function in the libstdc++ library. This issue triggers an out-of-bounds read beyond the allocated buffer, potentially leading to invalid data parsing or an application crash.
CVE-2026-115456
“—” beside the score: it is equal to the CVSS score beside it.
Score 3.7 from GitHub Security Advisory (severity: LOW) published 2026-10-30. A secondary CVSS source baseline 3.7; sources differ by 0.0.
Also known asEUVD-2026-113750 (ENISA EUVD) · GHSA-8wqr-r4rr-gg45 (GitHub Security Advisories)Source: ENISA EUVD
- Lower severity and no public exploit yet
A fix is available — apply it.
- CVSS v3
- 3.7
- EG Score
- 3.7LOWhigh confidence
- EG Risk
- 17EG Risk 17/100
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)Severity37% × 45%Impact severity (EG Severity): CVSS 3.7 of 10. Never the KEV-floored or EPSS-lifted EG Score.Exploitation0.3% × 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
- 0.4%
- EPSS %ILE
- 31st
- 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 (3.7): severity, escalated by confirmed exploitation. This CVE's 3.7 is its impact severity (EG Severity), not escalated.
- EG Severity
- 3.7 LOWCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
- EG Likelihood
- 0.4% within 30 daysSource: FIRST EPSS. 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 30, 2026
Last Modified
November 13, 2026
References (11)
- secalert@redhathttps://access.redhat.com/errata/RHSA-2026:95581Vendor Advisory
- secalert@redhathttps://access.redhat.com/errata/RHSA-2026:95981Vendor Advisory
- secalert@redhathttps://access.redhat.com/errata/RHSA-2026:98524Vendor Advisory
- secalert@redhathttps://access.redhat.com/errata/RHSA-2026:98526Vendor Advisory
- secalert@redhathttps://access.redhat.com/errata/RHSA-2026:98534Vendor Advisory
- secalert@redhathttps://access.redhat.com/errata/RHSA-2026:98633Vendor Advisory
- secalert@redhathttps://access.redhat.com/errata/RHSA-2026:98640Vendor Advisory
- secalert@redhathttps://access.redhat.com/errata/RHSA-2026:98648Vendor Advisory
- secalert@redhathttps://access.redhat.com/errata/RHSA-2026:99632Vendor Advisory
- secalert@redhathttps://access.redhat.com/security/cve/CVE-2026-115456VDB Entry
- secalert@redhathttps://bugzilla.redhat.com/show_bug.cgi?id=2563044Issue Tracking
Vendor Advisories for CVE-2026-115456(8)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
- RHSA-2026:99632Red Hat Product SecurityMedium
Red Hat Security Advisory: gcc-toolset-15-gcc security update
- RHSA-2026:98640Red Hat Product SecurityMedium
Red Hat Security Advisory: gcc-toolset-16-gcc security update
- RHSA-2026:98633Red Hat Product SecurityMedium
Red Hat Security Advisory: gcc-toolset-15-gcc security update
- RHSA-2026:98534Red Hat Product SecurityMedium
Red Hat Security Advisory: gcc-toolset-16-gcc security update
- RHSA-2026:98524Red Hat Product SecurityMedium
Red Hat Security Advisory: gcc security update
- RHSA-2026:98526Red Hat Product SecurityMedium
Red Hat Security Advisory: gcc-toolset-15-gcc security update
- RHSA-2026:98648Red Hat Product SecurityMedium
Red Hat Security Advisory: gcc security update
- GHSA-8wqr-r4rr-gg45GitHub Security AdvisoriesLow
A flaw was found in gcc. An attacker could cause a Denial of Service (DoS) by passing a string...
Patch Availability(8)
| Vendor / Ecosystem | Fix (by version range) / Patch | Released | Source |
|---|---|---|---|
| redhat | gcc-toolset-15-gcc-0:15.2.1-7.3.el8_10 | 2026-11-12 | redhat |
| redhat | gcc-toolset-15-gcc-0:15.2.1-8.2.el10_3 | 2026-11-11 | redhat |
| redhat | gcc-0:11.5.0-17.el9_9 | 2026-11-11 | redhat |
| redhat | gcc-toolset-16-gcc-0:16.2.1-1.4.el10_3 | 2026-11-11 | redhat |
| redhat | gcc-toolset-15-gcc-0:15.2.1-7.4.el9_9 | 2026-11-11 | redhat |
| redhat | gcc-toolset-16-gcc-0:16.2.1-1.4.el9_9 | 2026-11-11 | redhat |
| redhat | gcc-0:14.4.1-5.el10_3 | 2026-11-11 | redhat |
| redhat | gcc-main-16.2.1-3.2.hum1 | 2026-11-05 | redhat |
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
(10 across 3 ecosystems)
Debian:14(5)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| gcc-12 | 12.4.0-5 ... 12.5.0-9 (16 versions) |
| — |
| gcc-13 | 13.3.0-16 ... 13.5.0-4 (19 versions) |
| — |
| gcc-14 | 14.2.0-19 ... 14.4.0-4 (27 versions) |
| — |
| gcc-15 | 15-20241128-1 ... 15.3.0-5 (52 versions) |
| — |
| gcc-16 | 16-20251130-1 ... 16.2.0-4 (26 versions) |
| — |
Debian:13(3)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| gcc-12 | 12.4.0-5 ... 12.5.0-9 (16 versions) |
| — |
| gcc-13 | 13.3.0-16 ... 13.5.0-4 (19 versions) |
| — |
| gcc-14 | 14.2.0-19 ... 14.4.0-4 (27 versions) |
| — |
Debian:12(2)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| gcc-11 | 11.3.0-12 ... 11.5.0-9 (27 versions) |
| — |
| gcc-12 | 12.2.0-14 ... 12.5.0-9 (47 versions) |
| — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Additional Vendor Advisories
(1)
Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.
Data Freshness Timeline
(refreshed 36× in last 7d / 52× 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.
- 2026-11-13 16:50 UTCEPSS rescoreEPSS 0.4% · 31st percentile
- 2026-11-13 14:29 UTCEchelonGraph re-scored
- 2026-11-13 14:29 UTCVendor advisory
- 2026-11-13 14:29 UTCGHSA enrichmentGHSA-8wqr-r4rr-gg45 · GitHub severity LOW · GitHub CVSS 3.7
- 2026-11-13 13:50 UTCEchelonGraph re-scored
- 2026-11-13 13:50 UTCVendor advisory
- 2026-11-13 13:50 UTCGHSA enrichmentGHSA-8wqr-r4rr-gg45 · GitHub severity LOW · GitHub CVSS 3.7
- 2026-11-13 05:30 UTCEchelonGraph re-scored
- 2026-11-13 05:30 UTCVendor advisory
- 2026-11-13 05:30 UTCGHSA enrichmentGHSA-8wqr-r4rr-gg45 · GitHub severity LOW · GitHub CVSS 3.7
- 2026-11-13 04:24 UTCEchelonGraph re-scored
- 2026-11-13 04:24 UTCVendor advisory
- 2026-11-13 04:24 UTCGHSA enrichmentGHSA-8wqr-r4rr-gg45 · GitHub severity LOW · GitHub CVSS 3.7
- 2026-11-12 18:29 UTCEchelonGraph re-scored
- 2026-11-12 18:29 UTCVendor advisory
- 2026-11-12 18:29 UTCGHSA enrichmentGHSA-8wqr-r4rr-gg45 · GitHub severity LOW · GitHub CVSS 3.7
- 2026-11-12 17:32 UTCEchelonGraph re-scored
- 2026-11-12 17:32 UTCVendor advisory
- 2026-11-12 17:32 UTCGHSA enrichmentGHSA-8wqr-r4rr-gg45 · GitHub severity LOW · GitHub CVSS 3.7
- 2026-11-12 16:33 UTCEPSS rescoreEPSS 0.3% · 24th percentile
- 2026-11-11 20:43 UTCEchelonGraph re-scored
- 2026-11-11 20:43 UTCVendor advisory
- 2026-11-11 20:43 UTCGHSA enrichmentGHSA-8wqr-r4rr-gg45 · GitHub severity LOW · GitHub CVSS 3.7
- 2026-11-11 19:28 UTCEchelonGraph re-scored
- 2026-11-11 19:28 UTCVendor advisory
Show 51 moreShow fewer
- 2026-11-11 19:28 UTCGHSA enrichmentGHSA-8wqr-r4rr-gg45 · GitHub severity LOW · GitHub CVSS 3.7
- 2026-11-11 16:38 UTCEPSS rescoreEPSS 0.2% · 12th percentile
- 2026-11-11 15:27 UTCEchelonGraph re-scored
- 2026-11-11 15:27 UTCVendor advisory
- 2026-11-11 15:27 UTCGHSA enrichmentGHSA-8wqr-r4rr-gg45 · GitHub severity LOW · GitHub CVSS 3.7
- 2026-11-11 14:19 UTCEchelonGraph re-scored
- 2026-11-11 14:19 UTCVendor advisory
- 2026-11-11 14:19 UTCGHSA enrichmentGHSA-8wqr-r4rr-gg45 · GitHub severity LOW · GitHub CVSS 3.7
- 2026-11-11 13:29 UTCEchelonGraph re-scored
- 2026-11-11 13:29 UTCVendor advisory
- 2026-11-11 13:29 UTCGHSA enrichmentGHSA-8wqr-r4rr-gg45 · GitHub severity LOW · GitHub CVSS 3.7
- 2026-11-11 12:44 UTCEchelonGraph re-scored
- 2026-11-11 12:44 UTCVendor advisory
- 2026-11-11 12:44 UTCGHSA enrichmentGHSA-8wqr-r4rr-gg45 · GitHub severity LOW · GitHub CVSS 3.7
- 2026-11-11 12:28 UTCEchelonGraph re-scored
- 2026-11-11 12:28 UTCVendor advisory
- 2026-11-11 12:28 UTCGHSA enrichmentGHSA-8wqr-r4rr-gg45 · GitHub severity LOW · GitHub CVSS 3.7
- 2026-11-11 11:29 UTCEchelonGraph re-scored
- 2026-11-11 11:29 UTCGHSA enrichmentGHSA-8wqr-r4rr-gg45 · GitHub severity LOW · GitHub CVSS 3.7
- 2026-11-10 16:42 UTCEPSS rescoreEPSS 0.2% · 12th percentile
- 2026-11-09 19:28 UTCEchelonGraph re-scored
- 2026-11-09 19:28 UTCGHSA enrichmentGHSA-8wqr-r4rr-gg45 · GitHub severity LOW · GitHub CVSS 3.7
- 2026-11-09 18:55 UTCEchelonGraph re-scored
- 2026-11-09 18:55 UTCGHSA enrichmentGHSA-8wqr-r4rr-gg45 · GitHub severity LOW · GitHub CVSS 3.7
- 2026-11-09 16:34 UTCEPSS rescoreEPSS 0.2% · 12th percentile
- 2026-11-08 16:38 UTCEPSS rescoreEPSS 0.2% · 12th percentile
- 2026-11-07 16:38 UTCEPSS rescoreEPSS 0.2% · 12th percentile
- 2026-11-06 18:29 UTCEchelonGraph re-scored
- 2026-11-06 18:29 UTCGHSA enrichmentGHSA-8wqr-r4rr-gg45 · GitHub severity LOW · GitHub CVSS 3.7
- 2026-11-06 17:58 UTCEchelonGraph re-scored
- 2026-11-06 17:58 UTCGHSA enrichmentGHSA-8wqr-r4rr-gg45 · GitHub severity LOW · GitHub CVSS 3.7
- 2026-11-06 16:36 UTCEPSS rescoreEPSS 0.2% · 12th percentile
- 2026-11-05 16:36 UTCEPSS rescoreEPSS 0.2% · 12th percentile
- 2026-11-04 16:34 UTCEPSS rescoreEPSS 0.2% · 12th percentile
- 2026-11-03 20:28 UTCEchelonGraph re-scored
- 2026-11-03 20:28 UTCGHSA enrichmentGHSA-8wqr-r4rr-gg45 · GitHub severity LOW · GitHub CVSS 3.7
- 2026-11-03 19:47 UTCEchelonGraph re-scored
- 2026-11-03 19:47 UTCGHSA enrichmentGHSA-8wqr-r4rr-gg45 · GitHub severity LOW · GitHub CVSS 3.7
- 2026-11-03 16:46 UTCEPSS rescoreEPSS 0.2% · 12th percentile
- 2026-11-02 16:44 UTCEPSS rescoreEPSS 0.2% · 12th percentile
- 2026-11-01 16:33 UTCEPSS rescoreEPSS 0.2% · 12th percentile
- 2026-10-31 16:32 UTCEPSS rescoreEPSS 0.2% · 12th percentile
- 2026-10-30 16:33 UTCEPSS rescoreEPSS 0.2% · 12th percentile
- 2026-10-30 16:28 UTCEchelonGraph re-scored
- 2026-10-30 16:28 UTCGHSA enrichmentGHSA-8wqr-r4rr-gg45 · GitHub severity LOW · GitHub CVSS 3.7
- 2026-10-30 15:50 UTCEchelonGraph re-scored
- 2026-10-30 15:50 UTCGHSA enrichmentGHSA-8wqr-r4rr-gg45 · GitHub severity LOW · GitHub CVSS 3.7
- 2026-10-30 09:26 UTCEchelonGraph re-scored
- 2026-10-30 09:02 UTCENISA EUVD ID recordedEUVD-2026-113750 · Source: ENISA EUVD
- 2026-10-30 08:25 UTCEchelonGraph re-scoredFirst assessed: 3.7 LOW
- 2026-10-30 08:25 UTCMITRE cvelistV5first tracked
Related CVEs(same product + same vendor + same CWE)
Same product
7 shownDebian:12:gcc-11 · Debian:13:gcc-14 · Debian:12:gcc-12
Same vendor
3 shownredhat:RHSA-2026:98524 · redhat:RHSA-2026:98526
Frequently asked(5)
What is CVE-2026-115456?
When was CVE-2026-115456 made public?
Is CVE-2026-115456 actively exploited?
What is the CVSS score of CVE-2026-115456?
How do I remediate CVE-2026-115456?
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-115456
Is Your Infrastructure Affected by CVE-2026-115456?
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