CVE-2026-119600

MEDIUMPre-NVD 4.84.8
EchelonGraph scoreHIGH confidence

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

Score 4.8 from GitHub Security Advisory (severity: MODERATE) published 2026-10-30. A secondary CVSS source baseline 4.8; sources differ by 0.0.

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

Also known asEUVD-2026-113937 (ENISA EUVD) · GHSA-rjcg-fcj6-3hq4 (GitHub Security Advisories)Source: ENISA EUVD

4.8EG
EchelonGraph verdictMonitorNo release containing the referenced fix is confirmed: check the referenced fix and the vendor's advisory for a release that contains it; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 4.8Exploit: None knownExposed services: Not assessed

A fix is referenced (a reference tagged "Patch", often a source commit), but no release containing it is confirmed — find the release that contains it; until it is applied, mitigate (WAF / firewall / segmentation).

tcpflow before 1.7.0 contains an out-of-bounds read vulnerability that allows unauthenticated attackers to read process memory by sending packets with forged IP payload lengths. Attackers can inject crafted IPv4 or IPv6 TCP packets into captured traffic or pcap files to leak adjacent memory into reconstructed flow files or crash tcpflow.

CVSS v3
4.8
EG Score
4.8MEDIUMhigh confidence
EG Risk
22
EG Risk 22/100

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)
Severity48% × 45%
Impact severity (EG Severity): CVSS 4.8 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.4% × 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 referenced, but no release containing it is confirmed. Check the referenced fix and the vendor's advisory for a release that contains it; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule.
EPSS PROB
0.4%
EPSS %ILE
32nd
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 (4.8): severity, escalated by confirmed exploitation. This CVE's 4.8 is its impact severity (EG Severity), not escalated.

EG Severity
4.8 MEDIUMCVSS-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 (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.No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: it starts when an agency identifies the flaw on an asset and updates the CDM Agency and Federal Dashboard, and the directive counts patching, decommissioning the system or another action as remediation. Until a fixed release is applied, mitigate as this page's verdict says. In the directive's words, “Fix on system upgrade” means that, “unless conditions change”, the vulnerability “should be remediated the next time the vulnerable asset receives a scheduled major upgrade or rebuild”: its timelines are “dynamic as facts change”, and a KEV listing shortens them.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 referenced, but no release containing it is confirmed. Check the referenced fix and the vendor's advisory for a release that contains it; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule.

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.

No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: it starts when an agency identifies the flaw on an asset and updates the CDM Agency and Federal Dashboard, and the directive counts patching, decommissioning the system or another action as remediation. Until a fixed release is applied, mitigate as this page's verdict says. In the directive's words, “Fix on system upgrade” means that, “unless conditions change”, the vulnerability “should be remediated the next time the vulnerable asset receives a scheduled major upgrade or rebuild”: its timelines are “dynamic as facts change”, and a KEV listing shortens them.

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 9, 2026

Advisory Details (6)

Auto-updated Oct 30, 2026
Fix referenced — no release confirmed yet.
Web page

tcpflow through 1.6.1 Out-of-Bounds Read via TCP Demultiplexer Payload Length | Advisories | VulnCheck

https://www.vulncheck.com/advisories/tcpflow-through-1.6.1-out-of-bounds-read-via-tcp-demultiplexer-payload-length
Web page

tcpflow: a crafted IP header length lets the TCP demultiplexer read far past the captured packet buffer - HackMD

https://hackmd.io/@haindpwn/tcpflow-ip-payload-length-oob-read
Web page

tcpflow: a crafted IP header length lets the TCP demultiplexer read far past the captured packet buffer · Issue #279 · simsong/tcpflow · GitHub

https://github.com/simsong/tcpflow/issues/279
Web page

tcpflow/src/tcpdemux.cpp at tcpflow-1.6.1 · simsong/tcpflow · GitHub

https://github.com/simsong/tcpflow/blob/tcpflow-1.6.1/src/tcpdemux.cpp#L781
Web page

tcpflow/src/tcpdemux.cpp at tcpflow-1.6.1 · simsong/tcpflow · GitHub

https://github.com/simsong/tcpflow/blob/tcpflow-1.6.1/src/tcpdemux.cpp#L747
Web page

GitHub - simsong/tcpflow: TCP/IP packet demultiplexer. Download from: · GitHub

https://github.com/simsong/tcpflow

Vendor Advisories for CVE-2026-119600(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
tcpflow1.6.1-2, 1.6.1-3
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
tcpflow1.6.1-3
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
tcpflow1.6.1-3
  • every version on: no fix on record
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 10× in last 7d / 22× 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. 2026-11-12 16:33 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  2. 2026-11-11 16:38 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  3. 2026-11-11 06:58 UTCEchelonGraph re-scored
  4. 2026-11-11 06:58 UTCGHSA enrichmentGHSA-rjcg-fcj6-3hq4 · GitHub severity MODERATE · GitHub CVSS 4.8
  5. 2026-11-10 16:42 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  6. 2026-11-09 20:28 UTCEchelonGraph re-scored
  7. 2026-11-09 20:28 UTCGHSA enrichmentGHSA-rjcg-fcj6-3hq4 · GitHub severity MODERATE · GitHub CVSS 4.8
  8. 2026-11-09 19:20 UTCEchelonGraph re-scored
  9. 2026-11-09 19:20 UTCGHSA enrichmentGHSA-rjcg-fcj6-3hq4 · GitHub severity MODERATE · GitHub CVSS 4.8
  10. 2026-11-09 16:34 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  11. 2026-11-08 16:38 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  12. 2026-11-07 16:38 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  13. 2026-11-06 16:36 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  14. 2026-11-05 16:36 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  15. 2026-11-04 23:29 UTCEchelonGraph re-scored
  16. 2026-11-04 23:29 UTCGHSA enrichmentGHSA-rjcg-fcj6-3hq4 · GitHub severity MODERATE · GitHub CVSS 4.8
  17. 2026-11-04 22:35 UTCEchelonGraph re-scored
  18. 2026-11-04 22:35 UTCGHSA enrichmentGHSA-rjcg-fcj6-3hq4 · GitHub severity MODERATE · GitHub CVSS 4.8
  19. 2026-11-04 16:34 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  20. 2026-11-04 01:50 UTCEchelonGraph re-scored
  21. 2026-11-04 01:50 UTCGHSA enrichmentGHSA-rjcg-fcj6-3hq4 · GitHub severity MODERATE · GitHub CVSS 4.8
  22. 2026-11-03 16:46 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  23. 2026-11-02 16:44 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  24. 2026-11-01 16:33 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  25. 2026-10-31 16:32 UTCEPSS rescoreEPSS 0.4% · 31st percentile
Show 6 more
  1. 2026-10-30 19:34 UTCEchelonGraph re-scored
  2. 2026-10-30 19:34 UTCGHSA enrichmentGHSA-rjcg-fcj6-3hq4 · GitHub CVSS 4.8
  3. 2026-10-30 15:02 UTCENISA EUVD ID recordedEUVD-2026-113937 · Source: ENISA EUVD
  4. 2026-10-30 14:26 UTCEchelonGraph re-scored
  5. 2026-10-30 13:25 UTCEchelonGraph re-scoredFirst assessed: 4.8 MEDIUM
  6. 2026-10-30 13:25 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-119600?
CVE-2026-119600 is a medium-severity vulnerability; its CVE record was published on October 30, 2026. tcpflow before 1.7.0 contains an out-of-bounds read vulnerability that allows unauthenticated attackers to read process memory by sending packets with forged IP payload lengths. Attackers can inject crafted IPv4 or IPv6 TCP packets into captured traffic or pcap files to leak adjacent memory into…
When was CVE-2026-119600 made public?
CVE-2026-119600 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 30, 2026. EchelonGraph's copy of the record carries a last-modified date of November 9, 2026; the record at its source may have been updated since.
Is CVE-2026-119600 actively exploited?
CVE-2026-119600 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (32nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-119600?
CVE-2026-119600 has a CVSS base score of 4.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-119600?
A fix for CVE-2026-119600 is referenced (a reference tagged "Patch", often a source commit), but EchelonGraph has no release containing it on record. Check that reference and the vendor's advisory for a release that contains the fix and update to it; until then, restrict network exposure of the affected system or apply the vendor's mitigation. The vendor advisories EchelonGraph has for CVE-2026-119600 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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