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Early warnings

Early warning

Apache patches critical HTTP Server RCE flaw CVE-2026-119618

Apache fixed a race condition in mod_http2 that could allow unauthenticated remote code execution on servers with HTTP/2 enabled, affecting versions 2.4.55 through 2.4.70.

SZB-33a311bb79

Written by a model from the sources below. Verify against them.

Sources13Confirmed
Kind
Pending CVE
Vendor
Apache
Product
HTTP Server (mod_http2)
Attacker tool
Anthropic OSS Scanner, Google Cloud Vulnerability Research, literature.cafe
Status
Confirmed
First seen
Confirmed

Summary

Apache fixed a race condition in mod_http2 that could allow unauthenticated remote code execution on servers with HTTP/2 enabled, affecting versions 2.4.55 through 2.4.70. Red Hat assigned it a CVSS score of 9.8, and Wiz reported that no exploit or exploitation in the wild was known when its blog was published on November 11.

What to do

  • Upgrade Apache HTTP Server to version 2.4.71 or install the vendor-supplied packages.

  • If updates cannot be deployed immediately, disable HTTP/2 to temporarily prevent exploitation.

  • Identify servers running affected versions with HTTP/2 enabled and prioritize them for patching.

  • Upgrade Apache HTTP Server to the fixed release.

  • If you cannot patch immediately, disable HTTP/2 (h2) in the server configuration.

  • Review exposed servers that have HTTP/2 enabled and prioritize them for patching.

Timeline

  1. Made public by r/sysadmin
  2. First seen by cve.now1 day
  3. Confirmed as CVE-2026-1196181 day
  4. Record last updated

On X 10

Evidence 13

  1. Social
    r/sysadmin
    “Critical RCE reported in Apache HTTP Server when using mod_http2.”
  2. Social
    Mastodon
    “Update Apache HTTP Server to 2.4.71 now to fix CVE-2026-119618, a critical mod_http2 remote code execution flaw, alongside CVE-2026-106023.”
    +5 more: Mastodon, Mastodon, Mastodon, Mastodon, Mastodon
  3. Social
    Mastodon
    “Concurrent Execution using Shared Resource with Improper Synchronization vulnerability in Apache HTTP Server's mod_http2 in assign_headers() can lead to RCE.”
    +2 more: Mastodon, Mastodon
  4. Social
    oss-security
    “CVE-2026-106023: Apache HTTP Server: mod_md NULL pointer dereference leads to child process crash”
  5. Social
    oss-security
    “CVE-2026-109163: Apache HTTP Server: mod_vhost_alias 1 byte stack buffer overwrite (after CVE-2026-63292)”
Show all 13 sourcesShow fewer sources
  1. Social
    oss-security
    “CVE-2026-119618: Apache HTTP Server: mod_http2: heap corruption and RCE in assign_headers”
  2. Social
    Mastodon
    “⚠️ PATCH NOW Apache HTTP Server 2.4.55 to 2.4.70 has a critical race in its HTTP/2 module (CVE-2026-119618) that Apache says can lead to code execution.”
  3. Social
    Mastodon
    “Debian has released a fix to Apache2 mod_http2 # CVE_2026_119618 vulnerability.”
  4. Social
    Mastodon
    “thehackernews.com/2026/11/crit ical-apache-http2-flaw-could-let.html”
  5. Press
    SecurityWeek
    “Apache has patched a critical HTTP Server vulnerability that could allow unauthenticated remote code execution (RCE), following independent discoveries by Anthropic and Google researchers.”
  6. Social
    Mastodon
    “Critical RCE Vulnerability in Apache HTTP Server: Everything You Need To Know”
  7. Press
    BleepingComputer
    “A critical vulnerability in the HTTP/2 module of Apache HTTP Server could be exploited by an unauthenticated attacker to obtain remote code execution (RCE).”
    +1 more: BleepingComputer on Bluesky
  8. Social
    Mastodon
    “A # critical race-condition # vulnerability has been identified in the # mod_http2 module of the # Apache HTTP Server.”

Corrections

None so far.

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Questions about SZB-33a311bb79

Has Apache confirmed it?

Yes. Confirmed as CVE-2026-119618.Source: r/sysadmin, Mastodon, Mastodon, oss-security, oss-security, oss-security, Mastodon, Mastodon, Mastodon, SecurityWeek, Mastodon, BleepingComputer, Mastodon

What should Apache and Apache HTTP Server users do?

Upgrade Apache HTTP Server to version 2.4.71 or install the vendor-supplied packages. If updates cannot be deployed immediately, disable HTTP/2 to temporarily prevent exploitation. Identify servers running affected versions with HTTP/2 enabled and prioritize them for patching. Upgrade Apache HTTP Server to the fixed release. If you cannot patch immediately, disable HTTP/2 (h2) in the server configuration. Review exposed servers that have HTTP/2 enabled and prioritize them for patching.

Does it have a CVE?

Yes. It is tracked as CVE-2026-119618, CVE-2026-106023 and CVE-2026-109163.Source: CVE-2026-119618, CVE-2026-106023, CVE-2026-109163