CVE-2026-119618

UNRATEDCVSS · not yet scoredTrending — Patch released this weekElevated

Also known asEUVD-2026-123532 (ENISA EUVD) · GHSA-hjhf-gpg9-qqfj (GitHub Security Advisories)Source: ENISA EUVD

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EchelonGraph verdictPlan a fixWithin your standard update timelines — no confirmed exploitation yet.
  • Public exploit or proof-of-concept code is available
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS v2: —Exploit: Public PoCExposed services: Not assessed

A fix is available — apply it.

Concurrent Execution using Shared Resource with Improper Synchronization vulnerability in Apache HTTP Server's mod_http2 in assign_headers() can lead to RCE.

This issue affects Apache HTTP Server: from 2.4.55 through 2.4.70. Affected releases of mod_h2 from GitHub: from 2.0.8 through 2.0.42.

CVSS
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EchelonGraph score
Not yet assessedNo source has published severity data for this CVE yet — no CVSS score from NVD or a CNA, no GitHub advisory, and it is not in CISA KEV. This is not a rating of zero; we cannot assess it yet.
EG Score
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EG Risk
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EPSS PROB
0.4%
EPSS %ILE
34th
KEV
Not listed

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

EG Severity
Not assessed: no CVSS publishedA missing CVSS is not a severity of zero.
EG Likelihood
0.4% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-12). 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
No SSVC decision: EchelonGraph has not assessed this CVECISA BOD 26-04: 14 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 BOD 26-04 block below.

BOD 26-04 (CISA's remediation timeline, Table 1)14 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's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). Where an input reads “CISA's BOD 26-04 default”, no one has published it for this CVE, and CISA's implementation guidance says: “If “Automatable” and “Technical Impact” information items about a CVE ID are not available and the CVE ID is not in the KEV Catalog, CISA will treat its values as “no” and “total,” respectively, until CISA or a third party provides metadata about the CVE ID. CISA will always provide the Vulnrichment data for a CVE ID listed in the KEV Catalog.” 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

November 11, 2026

Last Modified

November 12, 2026

References (8)

Vendor Advisories for CVE-2026-119618(8)

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

Patch Availability(7)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatmod_http2-0:2.0.29-2.el10_0.32026-11-11redhat
redhatmod_http2-0:2.0.29-4.el10_2.32026-11-11redhat
redhatmod_http2-0:2.0.26-7.el9_9.12026-11-11redhat
redhatmod_http2-0:2.0.26-6.el9_8.32026-11-11redhat
redhatmod_http2-0:2.0.26-4.el9_6.32026-11-11redhat
redhatmod_http2-0:2.0.29-5.el10_3.12026-11-11redhat
redhatmod_http2-0:2.0.26-2.el9_4.42026-11-11redhat

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.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 17× in last 7d / 17× 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 → 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 21:29 UTCGHSA enrichmentGHSA-hjhf-gpg9-qqfj
  2. 2026-11-12 17:09 UTCEchelonGraph re-scored
  3. 2026-11-12 17:09 UTCVendor advisory
  4. 2026-11-12 17:09 UTCGHSA enrichmentGHSA-hjhf-gpg9-qqfj
  5. 2026-11-12 16:33 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  6. 2026-11-12 10:28 UTCVendor advisory
  7. 2026-11-12 10:28 UTCGHSA enrichmentGHSA-hjhf-gpg9-qqfj
  8. 2026-11-12 09:32 UTCVendor advisory
  9. 2026-11-12 09:32 UTCGHSA enrichmentGHSA-hjhf-gpg9-qqfj
  10. 2026-11-11 19:28 UTCGHSA enrichmentGHSA-hjhf-gpg9-qqfj
  11. 2026-11-11 19:27 UTCNVD update
  12. 2026-11-11 19:11 UTCGHSA enrichmentGHSA-hjhf-gpg9-qqfj
  13. 2026-11-11 16:00 UTCENISA EUVD ID recordedEUVD-2026-123532 · Source: ENISA EUVD
  14. 2026-11-11 15:58 UTCGHSA enrichmentGHSA-hjhf-gpg9-qqfj
  15. 2026-11-11 15:58 UTCMITRE cvelistV5
  16. 2026-11-11 15:47 UTCGHSA enrichmentGHSA-hjhf-gpg9-qqfj
  17. 2026-11-11 15:27 UTCNVD update
  18. 2026-11-11 14:58 UTCEchelonGraph re-scored
  19. 2026-11-11 14:58 UTCMITRE cvelistV5first tracked

Publicly available exploits

(1 reference)

Public exploit code is referenced for this CVE (1 GitHub PoC). Defenders should treat patch urgency accordingly.

  • GitHub PoCgooglesky/CVE-2026-119618
    Published Nov 12, 2026

    Apache httpd mod_http2 (2.4.55-2.4.70) races on the connection allocator when assign_headers() writes the synthesised Content-Length: 0 into the shared stream table, corrupting the child heap. Containerised lab, stdlib HTTP/2 PoC, ASan and TSan evidence, 2.4.71 differential, workaround test, 0day sweep.

    Open source ↗

Related CVEs(same vendor + same CWE)

Same vendor

1 shown

redhat:RHSA-2026:98953

Frequently asked(4)

What is CVE-2026-119618?
CVE-2026-119618 is a vulnerability whose severity is not yet rated; its CVE record was published on November 11, 2026. Concurrent Execution using Shared Resource with Improper Synchronization vulnerability in Apache HTTP Server's mod_http2 in assign_headers() can lead to RCE. This issue affects Apache HTTP Server: from 2.4.55 through 2.4.70. Affected releases of mod_h2 from GitHub: from 2.0.8 through 2.0.42.
When was the CVE record for CVE-2026-119618 published?
The CVE record for CVE-2026-119618 was published on November 11, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of November 12, 2026; the record at its source may have been updated since.
Is CVE-2026-119618 actively exploited?
CVE-2026-119618 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (34th percentile of EPSS-scored CVEs).
How do I remediate CVE-2026-119618?
A fix for CVE-2026-119618 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-119618 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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